What factor prevents us from finding fossils from the Precambrian era? A. Life-forms in this era had no skeletons.
B. This was before life existed on Earth.
C. Life was destroyed by a series of mass extinctions.
D. There are no rocks left from that era.

rhe answer is that the rocks of that time are buried deeply under the soil.

A. Life-forms in this era had no skeletons.

B. This was before life existed on Earth.

D. There are no rocks left from that era.

maritime tropical may be your answer.

2%? i tried finding the exact sorry if it's not 100% correct ; -;