Among the many concerns that gardeners must address is to decide wheth

Thanks,

In my opinion, the idea that the sentence "Soil pH is affected by many factors, including the amount of local rainfall and the temperature range in the area" alone gives a "general overview of the range of soil pH levels in the United States" is unfounded. It doesn't say anything about the range of soil pH levels. You definitely have to take into account the entire passage, but in my opinion that does not change anything in this case.

The only way this would work is if local rainfall and temperature were defined in previous paragraphs as contributing to a range of soil pH levels in the United States. The first sentence of the third paragraph does not give the general overview. Rather, the entire third paragraph provides the general overview.

even i agree to this. A seems to be a better answer the sentence and passage in question uses US as an example only. sentence mentions itself that the main point is the difference in PH according to climatic conditions in general.

Here are the answers explained in detail:

Main Point: The passage discusses the importance of soil pH for gardeners, how it affects nutrient availability for plants, and how various factors can influence the pH levels of soil in different regions.

Tone of Author: Neutral - The author presents factual information about soil pH and its implications for gardening without expressing personal opinions or emotions.

Paragraph Summaries:
1. Importance of soil pH for nutrient uptake in plants.
2. Tolerance of plants to a range of pH and availability of nutrients at different pH levels.
3. Factors affecting soil pH, including rainfall, temperature, and human activities like construction.

Analysis of Questions:

1. The correct answer is B: give a general overview of the range of soil pH levels in the United States. The first sentence in the third paragraph introduces the topic of regional differences in soil pH across the United States. This sentence is not a comparison (A), does not present pH as a fixed measurement (C), is not introducing the concept of soil pH (D), and does not provide advice on what plants to grow (E).

2. The correct answer is D: Seed manufacturers are careful to give clear instructions on the best soil pH for their plants, and their directives must be followed. The passage suggests that while seed manufacturers provide a good pH range, most plants will tolerate a wider range than what is suggested, which implies that the directives do not need to be strictly followed. The other statements are supported by the passage, making D the only statement the author would not agree with.

3. The correct answer is B: give an overview of soil pH levels and make a case for how understanding them can improve a gardener’s yield. The passage discusses how soil pH affects plant nutrient uptake and how understanding this can help gardeners. It does not provide growing advice based on location (A), review general gardening practices (C), demonstrate how to calculate soil pH (D), or explain how to test for soil pH (E).

4. The correct answer is B: Rainfall and temperature. The passage specifically mentions that rainfall and temperature range in the area affect soil pH. It does not mention wind (A and C) as a factor, nor does it discuss the impact of topsoil and alkalinity (D), or alkalinity and acidity (E) as direct factors affecting soil pH.

In question 2 why not the answer is A as it mentions unpredictable and it is nowhere in the passage mentioned that it is unpredictable quantity

A is incorrect because the author does not explicitly state that soil pH is a shifting and unpredictable quality. Instead, he or she highlights that soil pH is affected by various factors, including local rainfall and temperature, but it doesn't characterize it as unpredictable.

1. The first sentence in the third paragraph is meant to

A. provide a comparison of soil pH levels for readers to use based on their location - No such comparison is mentioned in the paragraph
B. give a general overview of the range of soil pH levels in the United States - correct answer.
C. present soil pH as a fixed measurement that can be learned - Not mentioned
D. introduce the idea of soil pH - Introduction is given in earlier paragraphs ( 1st )
E. explain that the rest of the paragraph will give advice on what kind of plants to grow in various areas - No such advice given.

I eliminated the answers and based on that B was most suitable answer for me.­