Answer:
Birds require high levels of oxygen and, therefore, high rates of gas exchange due to flight demands. Avian resting oxygen consumption is high compared to that of mammals and other vertebrates, and this increases even more during the flight.
Explanation:
Compared to mammals, birds have specific adaptations of the respiratory system that result in higher levels of oxygen exchange.
i think c. is the best answer , we just got off that topic like a week ago .
Plants produce oxygen and glucose as a result of photosynthesis
Throwing garbage on the ground, not putting out a camp fire, lighting something that creates smoke...
