Concept:The webbed feet of frogs and toads are an adaptation for moving efficiently through water.Explanation:The thin skin between their toes increases the surface area of the foot.This allows the foot to push against water with greater force.As a result, frogs and toads can propel themselves swiftly while swimming.This helps them catch prey and escape predators in aquatic environments.Webbed feet are not essential for leaping, walking, or mating.Answer:C. swimming