Answer:
Ordovician extinction
.
Explanation:
The Ordovician extinction was an event that occurred around 450 million years ago and caused the <u>disappearance of 60% of marine species.</u>
This event was caused by global cooling which resulted in the <u>drop of the sea level</u>. This change mostly affected the species that developed life in the deep, depriving them of their natural habitat.
A chameleon you mean? well if it is, chameleons are Chamaeleonidaes and can change colors.
It is D. and A. Hope did helps ya
The answer to your question is Niagara Falls
