THE AUTHOR MENTIONS THE REDUCTION OF THE VARIETY OF SPECIES ON EAR...
30.
The author mentions the reduction of the variety of species on Earth in the last sentence of
paragraph 1 to suggest that _________.
A.
humans are often made ill by polluted water
B.
understanding evolution can prevent certain species from disappearing
C.
some species have been made extinct by human activity
D.
new habitats can be created for species