Answer:
Sunlight does not reach the bottom.
Explanation:
It honestly depends on how deep, Coral is more suited for shallow waters, where sunlight reaches.
Answer: Chemical weathering changes the composition of a rock, while physical weathering does not.
Explanation: The definition of a chemical change is a change that cannot be reversed and is caused by a chemical reaction. In this case, a chemical change to a rock would change the composition of the rock while physical changes may change the appearance of the rock, but not the composition.