Which of the following defines a renewable resource?

A renewable resource is characterized by its ability to regenerate naturally over time, allowing it to be replenished without depleting the source. This definition encompasses various resources, such as solar power, wind energy, and biofuels, which can be continuously produced and are maintained by natural processes. These resources can provide ongoing benefits without exhausting the supply, making them sustainable options for meeting energy and material needs.

The other descriptions do not fit the criteria for renewable resources. For instance, a resource that is depleted faster than it can regenerate would be considered non-renewable, as it risks becoming exhausted. A resource requiring significant human intervention to maintain does not inherently define renewability, as such maintenance may pertain to both renewable and non-renewable resources. Lastly, a resource sourced from deep underground reservoirs typically describes non-renewable resources like fossil fuels, which can take millions of years to form and are not replenished on a human timescale, contrasting sharply with the renewable nature of resources that can regenerate naturally.