Which is classified as a renewable resource?

a. sunlight

b. oil

c. natural gas

d. uranium

Oil, Natural gas and Uranium are not renewable resources: this means that if we use them too much, we'll run out of them - they will be replenished, but not in a human lifetime.

So the correct answer is a. sunlight. (it is technically not-renewable, but it's still going to be around for many years, possibly long after the human race is gone)