In this task, you are given a fact statement and question based on the fact. Your task is to generate the correct answer for the question. The answer needs to be generated using the context fact statement.
--------
Question: Fact: when a switch in a simple series circuit is closed , electricity will flow through the circuit. Question: This likely relies on a circuit being closed?

Answer: your iPhone charger


Question: Fact: sand dunes are made of sand. Question: The mounds at the beach are made of?

Answer: silica


Question: Fact: if the population of an organism increases then the ecosystem may become overpopulated with that organism. Question: Certain countries make it illegal to bring in certain species of animals that breed very fast because that will lead to?

Answer:
overpopulation