Answer:
marine mammal protection act
D - an increase in tree cover in the tundra.
C. Vestigial structure is the correct answer
The correct option is A.
Living organisms depend on their environment to survive, when there are changes in the environment which are not favorable to the living organisms, it will eventually leads to the wiping out of the living organisms. As time goes on and the environment recover, the living organisms that will be found in the new environment are those who will be able to survive in it.
