Answer:
the abiogenesis theory helps us understand
Explanation:
The answer is C.) Sac. More formally known as the amniotic sac. It's also sometimes called the bag of waters.
The timeline of human evolution outlines the major events in the evolutionary lineage of the modern human species, Homo sapiens, throughout the history of life, beginning some 4 billion years ago down to recent evolution within H. sapiens during and since the Last Glacial Period.
