It should be oxygen because plants take in carbon dioxide, sunlight, and water and get rid of oxygen, energy, and water. (see pic)
The answer is A: a flagship species.
Hope this helps :)
Last one - Biodiversity is the diversity of species in an area, which makes an ecosystem better prepared for major changes
Explanation:
If one crop struggles to grow then there will be plenty of others to substitute it. If a prey animal is dying at a faster rate and harder to find, predators can have other prey options and so forth. Biodiversity makes it so ecosystems can get past change.
