In what ways are forest non-renewable? in what ways can they be renewable resources?​

A renewable resource is a natural material that is replenished in the environment through natural processes. These materials can be used indefinitely, as long as they are not consumed at a rate faster than they can be restored.

the answer is a) a shiprock was formed by igneous process

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.