Which term means a resource that can regenerate quickly and that is replaceable?

• A. Renewable resource
• B. Nonrenewable resource
• C. Acid rain
• D. Invasive species

Answer: (A)

The thing being tested is how we classify resources by how quickly they can come back. A renewable resource is one that can regenerate quickly enough to be used again and replaced naturally within a human lifetime or shorter. This means we can rely on it repeatedly if we manage it wisely—sunlight, wind, moving water, and sustainably managed forests are classic examples. In contrast, nonrenewable resources form so slowly that once they’re used up, they aren’t replaced on any practical timescale, so they can run out. The other terms listed aren’t resources that renew quickly: acid rain is pollution that harms ecosystems, and invasive species are organisms that disrupt native communities, not resources that can be replenished. So the term that fits “regenerate quickly and replaceable” is renew­able resource.