A geologist finds that the number of fossils of a single species decreased significantly in higher rock layers compared to deeper ones.

Which Is the best conclusion?

A.
The species became extinct.

B.
The species became less abundant.

C.
The species became more abundant.

D.
The species became more difficult to fossilize.

Question

A geologist finds that the number of fossils of a single species decreased significantly in higher rock layers compared to deeper ones.
 
Which Is the best conclusion?
 
 A.
The species became extinct.
 
 B.
The species became less abundant.
 
 C.
The species became more abundant.
 
 D.
The species became more difficult to fossilize.

thadyoung · Answer

B.
The species became less abundant.