Official Solution:
As the temperature keeps rising in Antarctica, the risk of extinction faced by species that cannot migrate to the colder south has been increasing.
A. As the temperature keeps rising in Antarctica, the risk of extinction faced by species that cannot migrate to the colder south has been increasing.
B. As the temperature keeps rising in Antarctica, species unable to migrate to the colder south have been increasingly facing the risk of extinction.
C. As the temperature keeps rising in Antarctica, species that cannot migrate to the colder south are increasingly facing the risk of extinction.
D. The temperature keeps rising in Antarctica, and as a result, species that cannot migrate to the colder south have been increasingly facing the risk of extinction.
E. The temperature keeps rising in Antarctica, resulting in species unable to migrate to the colder south and are increasingly facing the risk of extinction.
A. The rise of temperature is occurring in the present (“temperature keeps rising”). The effect of this rise is the increase in the risk of extinction faced by certain species. Hence the verb “increase” should be in present tense or future tense. However, the verb is wrongly expressed in present perfect continuous “has been increasing”.
B. The rise of temperature is occurring in the present (“temperature keeps rising”). The effect of this rise is that certain species are facing or will be facing risk of extinction. Hence, the verb “to face” should be in present tense or future tense. However, the verb is wrongly expressed in present perfect continuous “have been facing”.
C. CORRECT. The verb “are facing” is correctly expressed in the present continuous.
D. The rise of temperature is occurring in the present (“temperature keeps rising”). The effect of this rise is that certain species are facing or will be facing risk of extinction. Hence, the verb “to face” should be in present tense or future tense. However, the verb is wrongly expressed in present perfect continuous “have been facing”.
E. The adjective “unable” and the verb “are facing” are wrongly used in parallel.
Answer: C