Which best explains how the human body obtains energy from food a. by inhaling oxygen into the lungs. b. by exhaling carbon dioxide. c. by removing dangerous wastes. d. by breaking chemical bonds

by breaking and reforming chemical bonds

D.by breaking chemical bonds

Explanation:

The human beings are complex organisms which obtains energy by breaking the chemical bonds present in the food. The food we eat is composed of complex molecules of carbohydrates, fats and proteins which are digested by the fluids present in the stomach. The chemical bonds present between the molecules and atoms are broken during digestion process into simple substances which can be digested and absorbed by the body easily to obtain energy.

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.