What is a complete protein? A.
A complete protein is a food source that contains all the essential amino acids.

B.
A complete protein is a food source such as vegetables and legumes.

C.
A complete protein is any food source that contains at least one essential amino acid.

D.
All of the above

A.

Explanation:

A.

A complete protein is a food source that contains all the essential amino acids.

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.