Describe how something comes to be seen as a resource and how it stops being a resource

Something is seen as a resource if it can be used to increase the wealth or the power of the country controlling it. It stops being a resource if it is depleted or if it becomes obsolete or if it turns out that it can cause cancer or something similar.

Answer (d) may increase or decrease porosity through dissolution or deposition;

Answera discharge of static electricity;