They decrease because the zebra mussel were taking their resources. Leaving them nothing to eat.
Answer:
B
Explanation:
if my memory is right then ima say B! pls brainlist if its correct!
Answer: This is a vertebrate animal with bilateral symmetry which has an endoskeleton. Most reproduce sexually through external fertilization.
Explanation:
I'm Smart
Answer: Yes they are
Explanation: plz mark brainliest
