What is a non-renewable resource?

a resource that is found in forests.

a resource that must be mined.

a resource that can be replenished faster than it runs out.

a resource that does not replenish itself faster than it is being used.

Explanation:

In effect, a non renewable resource is the last one, but no one would agree.

Something found in forests (like tree wood) is renewable.

Anything that can be replenished faster than it is used is renewable.

The answer you are looking for is the second one. Anything that is mined is not renewable. If you place a chunk of gold in a dark room and leave it there for a century, you will not find you have more gold when your return. Once you mine something, it's gone.

parasites can detrimentally affect their host, but also must not allow their host to die before they can complete their life cycle. some parasites have complex life cycles with many different hosts, and have had to find ways of persisting in many different environments during the change from one host to another. ectoparasites live outside the body of the host, and can more easily  disperse, but are  more exposed to predators, parasites, parasitoids. endoparasites live inside the body of the host, and are therefore protected from the outside environment. but they can be  attacked by the host's immune system. they have therefore developed  mechanisms for dispersal such as  complex life cycles.