Natural resources have a double-edge effect on economic growth, in that the intensity of its use raises output, but increases its depletion rate. ... Natural resources have limited direct economic use in satisfying human needs but transforming them into goods and services enhances their economic value to the society.
I hope this makes sense and helps :)
In this situation, Gerry is engaging in Symbolic play. Symbolic play is the ability of a child to use objects to represent another object (i.e. Gerry using his cane as a fire hose). Symbolic play is not limited to just objects representing other objects. A child can also use actions and ideas to represent other action or idea.
At around pre-school age, (3-5) children become more creative and imaginative and are able to associate roles with certain actions like how Gerry says he is a fireman as he does the gesture of putting out fire.