premise: living thing is a kind of organism sent2: living things require water for survival sent3: water is a kind of natural resource sent4: a desert environment is low in availability of water / availability of food sent5: as a population of organisms increases , the resources used by those organisms will decrease sent6: if the amount of something decreases then that something might be depleted sent7: if a resource is low in availability then it is more likely to be depleted.
hypothesis: increased populations are likely to cause water to be depleted in a desert environment