Resources that will eventually run out are
Oscarce
numerous
endless

Resources that will eventually run out are Oscarce.

Option: A

Explanation:

When a neutral stuff used by human being in a proper way then it is called resource. Resources are of two types: Physical resource and human resource. Physical resources are objects like coal, hydro electricity what we can touch. Human resources are non tangible. We can feel it but can't touch like knowledge, wisdom etc.

When resources are in the stage of eventually running out it is called scarce. Non-renewable energy resources face this kind of situation which once get finish can not be filled again like coal, petroleum known as fossil fuel. For sustainable development it is best to avoid this condition as much as we can.