It is inportant because kelp forest provide food and shelter for most sea creatures and provide foo for humans as well. It helps you undertsand that in the Maringe life there are plants that grow in saltwater like seawed and that they porvide food and also protection for smaller sea creatures.HOPE THIS HELPS.LET ME KNOW IF IT DOES. Or if a specific answer is needed.
I'm pretty sure that the answer is C
You can conclude that organisms B and C are more closely related than they are to organism A.
The answer is A because D would be contradictory to your question, B only works if it's out of the water, and C makes no sense. So yeah, A they swim into cooler water. Hope this helps!