Select the correct statement about the evolution of animals.

a. no animal fossils are found in strata formed before the cambrian explosion.
b. the oldest generally accepted fossils of large animals range in age from 565 to 550 million years old.
c. approximately half the phyla of living organisms are found in cambrian sediments.

The correct answer is b. The oldest generally accepted fossils of large animals range in age from 565 to 550 million years old.

Explanation:

The oldest one of them all is the hematite tubes, that are dated about 3.77 billion to 4.2 billion years and it's from a yet unknown bacteria.

c is the answer to this question. altitude affects the weather because air molecules evaporate.