Answer: C
Explanation: It isn't impossible to pollute and it is a usable water source AKA wells
The answer is D, The structure was probably functional in some ancestor of the modern organism. Vestigial structures are structures that have remained from ancestors but have no function in modern times.
(Please mark brainliest if this helped you!)
Answer:
an animal cell
Explanation:
all of these characteristics define an animal cell
