Which of these is a nonrenewable resource?
a. water
b. sunlight
c. metals
d. trees

A nonrenewable resource is a resource that can't be replenished quickly or effectively.
Water is a renewable resource because there is a lot of it, and it is always being replenished through the water cycle.
Sunlight is a inexorable resource, which is just a fancy way of saying it will never run out.
Trees can be planted, but they take a while to grow, but can, technically, be counted as a renewable resource.
Therefore, the only answer that doesn't grow back after you take it is metals.
Your answer is C. Metals.