The main purpose of the Chupacabra reading?

The chupacabra literally chupar, 'to suck', and cabras, 'goats') is a legendary creature in the folklore of parts of the Americas, with its first purported sightings reported in Puerto Rico in 1995. The name comes from the animal's reported vampirism—the chupacabra is said to attack and drink the blood of livestock, including goats.

its c because its his point of view

the correct answer is option d. none of these. it is noted that options a, b, and c share the same content.

despite the valid answer provided at the last sentence of each of the options, a question/answer format shouldn't include humourous themed responses such as "you bet your thermal pj's we do." - unless of course, the answer is carried out in an informal environment. this could be replaced with a simple "yes" or "it is necessary".

the question should be re-phrased to a more appropiate syntaxis. instead of "do we need the greenhouse effect? ", it should be written as "is the greenhouse effect necessary? " in order to give it a general scope, instead of limiting the answer to the needs of "we" the humans.