Final answer:
In designing a model representing the intertwined carbon and oxygen cycles, Ava should include photosynthesis and cellular respiration as key processes.
Explanation:
Ava should include photosynthesis and cellular respiration in her model as they are essential processes that drive the carbon and oxygen cycles. Photosynthesis is the process through which plants and other organisms convert sunlight into energy, producing oxygen as a byproduct. Cellular respiration is the process by which organisms use oxygen to produce energy, releasing carbon dioxide as a byproduct.
Learn more about carbon and oxygen cycles here:
https://brainly.com/question/7219890
