Answer:
A and B reeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
Photosynthesis is one of the main processes that is basically responsible for the function of all living things. Without it carbon would not be cycled, oxygen would not be made and plants would not be able to creat food for themselves and would have to rely on another source.
A focus group is an interview conducted by a trained moderator among a small group of respondents in an unstructured and natural manner.
Answer:
D
Explanation:
The atmosphere is not an eycosystem
The pulmonary vein brings the oxygenated (clean) blood to the left atrium.
Pls mark this as the brainliest
