Explain why autotroph is used to describe producers

 An autotroph is an organism that can produce its own food using light, water, carbon dioxide, or other chemicals. Because autotrophs produce their own food, they are sometimes called producers. Most autotrophs use a process called photosynthesis to make their food.

Explanation:

bc blah

explanation:

bc blah

the answer is c.) there is a warm front in region a and a stationary front in region b.