The right option is; b) Echolocation helps dolphins find food and avoid predators.
Echolocation is a physiological process by which several kinds of animals (such as dolphins and bats) use sound waves and echoes to determine the location of objects in space. Dolphins have the ability to use echolocation and their normal sight to determine some information such as the distance, speed, size and structure of objects in the water around them. This information helps dolphins find food and avoid predators in their environment.
