3. Coral reefs serve as the breeding place and homes for lots of marine animals, which make
marine food chain active and continuous. Because of its great diversity, competition arises.
Which of the following shows correct interactions between shrimp and clams?
A. When an organism benefits from each other.
B. When animal hunts or eats other animal for food.
C. When only one organism benefits while the other is badly affected.
D. When only one organism benefits while the other is not harmed or affected​