Final answer:
Natural resources are classified as renewable, replenished as used, and nonrenewable, existing in fixed amounts and used faster than replenishment.
Step-by-step explanation:
The correct description of natural resources is that they can be classified into two main types: renewable resources and nonrenewable resources. Renewable resources are those that can be replenished by natural processes at the same rate as they are consumed by humans, such as sunlight, wind, and sustainable agriculture.
On the other hand, nonrenewable resources exist in fixed amounts and are consumed faster than they can be naturally replenished, examples being fossil fuels like coal and oil.