The answer is B) greater than
The answer is because biology is easy and they're known around the world.
Answer:
see below :)
Explanation:
There are three types of ecosystems; freshwater, ocean, and terrestrial.
Carbon dioxide because people in other animals exhale carbon dioxide as a waste product. People and other animals need oxygen for plants produce oxygen during an important process called photosynthesis which turns the sun energy into nutrients so carbon dioxide would be the answer.
