Multiple choice Why is biodiversity important to a marine ecosystem? Larger species can help protect smaller species from predators. Fish have a greater variety of food so they will want to stay. Diversity means a better chance of surviving outside threats. Greater diversity means an ecosystem will grow larger. Reveal answer Fill a bubble to check yourself C Correct answer Explanation Biodiversity increases the resilience of an ecosystem, meaning it is better able to recover from disturbances and withstand environmental changes or outside threats.