I'm pretty sure the answer is D
The Silurian period occurred before the Neogene period.
I hope this helps.
A is your answer. When only one parent produces the offspring, they are essentially cloning themselves, and it is called asexual reproduction. The offspring only have the genes of the one parent. A lack of genetic diversity is one of the drawbacks to asexual reproduction.
It tells us how they might have looked weighed, ate and tall the were
