To determine whether a resource is renewable or nonrenewable, the most relevant question from the options provided is:
Is the resource unlimited or able to be replaced within a reasonable time?
This question directly addresses the key distinction between renewable resources (which can be replenished naturally at a sustainable rate) and nonrenewable resources (which exist in finite amounts and cannot be replenished within a human timeframe).
The other questions, while they may touch on important aspects related to the environmental impact or practical applications of a resource, do not specifically address the characteristics that define whether a resource is renewable or nonrenewable.