Answer: During the Cambrian Explosion of Animal Life
I believe the answer is tertiary
Mostly, it would be social scientists however, some biologist could also explain these behavioral characteristics and temperaments like geneticists and cognitive scientists.
Variables and factors like the biological, environmental and evolutionary component of how a trait is unearth by these experts.
Answer:
B. Ice gains heat becomes liquid, gains more heat, and forms a gas.
Explanation: