Pls plsss help, this is like the simplest of the simplest no cap

C

Explanation:

The reason being is that plants take in carbon dioxide, and exhale oxygen, humans and flatworms inhale oxygen, and breathe out carbon dioxide.

answer: land bridge theory. land bridge theory held that shifting portions of dry land explained the finding of identical species on different continents. plate tectonic theory eventually eliminated the land bridge theory.

c is the answer to this question. altitude affects the weather because air molecules evaporate.