Answer:
The correct answer is A!
Hope it helps! Thank You! Please mark me Brainliest!
Answer: I believe it is C: delivers nutrients to cells, removes cellular waste, and fights infection.
Forgive me if im wrong but its what I choose on the exam
The beginning of the Cambrian Period is marked by the evolution of hard body parts such as calcium carbonate shells. ... These body parts fossilize more easily than soft tissues, and thus the fossil record becomes much more complete after their appearance.
