The base of a cumulus cloud was determined to be 500
meters above the earth's surface. this is the altitude at
which
a) cumulus clouds always form
b) no dust is present in the air
c) the air temperature drops below 0°c
d) the air temperature equals the dewpoint
temperature

i have a feeling this is a gay person trolling to make straights look bad.

answer; natural resources;

chemical digestion occurs in the stomach were hcl and pepsin forms chyme, the mouth in which salivary amylase breaks down starch to form bolus, and the small intestine specifically the duodenum.