AP BIOLOGY

Detailed explanation-1: -Both species of frogs ate a lot of insects, spiders, and some had eaten small stones as well.

Detailed explanation-2: -Frogs have long sticky tongues, it throws its sticky tongue out to its target, the insect gets stuck on the tongues and then the frog rolls back the tongue inside its mouth and swallows its prey.

Detailed explanation-3: -Adult frogs eat large quantities of insects, including disease vectors that can transmit fatal illnesses to humans (i.e. mosquitoes/malaria). Frogs also serve as an important food source to a diverse array of predators, including dragonflies, fish, snakes, birds, beetles, centipedes and even monkeys.

Detailed explanation-4: -Coming to the question when the frog feeds on an insect so it is a secondary consumer as it depends on another organism for their source of food. So the correct answer is (D) Secondary consumer.