What happens to the price of resources as reserves decline? and, what is the effect on demand (of that increase in price)?

As things run out, prices skyrocket, and fewer people get the item because they can not afford it 

answer and explanation;

composition refers to both the types of minerals within a rock and the overall chemical makeup of the rock while texture refers to the size and arrangement of the minerals or grains that make up a rock. both composition and texture can be used to classify rocks, such as igneous rocks. texture describes how the rock became solid or crystallized from liquid, melted rock. composition of a rock describes the minerals that make up a particular rock.