The poison arrow frog, which resides in the tropical forests of South America, has enough toxicity on its skin that a dart rubbed across the surface of the body can kill a small mammal. Scientists have found that venomous excretions are a result of a diet of beetles, which causes a chemical reaction to produce poison sweat. When the frogs no longer have beetles to devour, their poisonous abilities disappear.

Which of the following effectively paraphrases this text?

Darts dipped in the sweat of poison arrow frogs are used to kill small animals and provide food to villages in the forests of South America.
The poison arrow frog is lethal to some animals because of its love for eating beetles, which react with its body chemistry to make contact with its skin deadly.
The poison arrow frog has venomous secretions as a result of a diet of beetles that causes poisonous sweat due to a chemical reaction.
Poison arrow frogs are venomous because they eat insects.