I chose (E). Pre-thinking went like this.
The author's argument clearly is that "artificial" can be "better than natural". To this end, he/she presents as examples several skills such as digging, ploughing, building and wearing clothes. We need to identify what is common among these skills / activities since these form the basis of the author's argument.
While at first glance, they appear quite disparate (digging and ploughing are brute force activities, building today is a highly technological activity which wearing clothes is a matter of taste and art), we can identify that all of these activities are indulged in by human beings in order to achieve some purpose:
i) Digging - a wide variety of reasons, from laying foundations to burials.
ii) Ploughing - to grow crops and feed ourselves.
iii) Building - to make homes to live in.
iv) Wearing clothes - to protect us from the vagaries of nature (basic purpose).
The only thing all of these appear to have in common is that they, in some way, improve the lives of humans.
With this in mind, let us approach the options:
(A) There are human activities, such as making music, that are environmentally harmless.
The author does not argue that "artificial is better than natural" because some activities do not harm the environment. Therefore, this is unlikely to be the author's counter argument.(B) Harming the environment is not an end, or purpose, of the arts of life.
The author does not defend the "artificial" because its intention is not to harm the environment. In fact, nowhere in the argument does intent play any role. Incorrect.(C) The construction could involve the use of natural, not artificial, materials.
The author's does not focus on the means of performing the arts at all. His/her argument is that "artificial" need not be worse than "natural" simply because of the wide variety of activities that result in something "artificial". Therefore, the use of materials is irrelevant to the author's argument.(D) Constructing buildings is not an “art of life.”
The author explicitly lists "building" as an art of life. Incorrect.(E) Even if the natural environment is disturbed by the construction of buildings, it is improved for human use.
This is consistent with our pre-thinking. Correct.Hope this helps.