The answer to your question would be B
It is the large intestine
Will increase, in order to adapt to the environment and reduce being spotted (exercising camouflage) a peppered moth will have a greater chance of surviving since it won't be spotted versus a white moth (which would stand out in a polluted location)
Since you are trying to investigate the possible variables that contribute to reef threats, it is advisable that you do an environmental study between two reefs that have characteristics that are similar or are closely similar. With this, you will be able to identify which is the primary cause of reef threats. Thus the correct answer is B.
