Answer:
supply
Explanation:
In Economics, a "supply" refers to <u>the amount/quantity of goods that a seller/producer is willing to sell/produce.</u> It goes hand-in-hand with the word "demand," which refers to the <u>amount/quantity of goods that a buyer/purchaser is willing to buy/purchase.</u>
For example, a seller wishes to sell junk food in his convenience store because he hopes to profit from it. The quantity of junk foods he wishes to sell is called the "supply."
'Climatic variations' and 'Human activities' can be regarded as the two main causes of desertification. removal of the natural vegetation cover（by taking too much fuel wood）, agricultural activities in the vulnerable ecosystems of arid and semi-arid areas, which are thus strained beyond their capacity.
Bodies of water often were used to create borders EX: in the eastern united states the states borders are rivers because it is easier than making imaginary borders
C the shape of rock deforms :))
