Which best describes the field of physical geography?

a. the study of patterns and processes that shape the interactions of humans with the world they live in
b. the study of earth's physical features
c. the study of connections between physical and human geography
d. the study of unique traits of different parts of the world

Which interaction between the atmosphere and biosphere takes place during plant respiration? plants use nitrogen and release oxygen into the atmosphere. plants use oxygen and release carbon dioxide into the atmosphere plants rely on available sunlight and release oxygen into the atmosphere. plants rely on mineral content in the ground and release carbon dioxide into the atmosphere.