Biology

The correct answer is: A.plants and animals.

Here’s why:

1.Oxygen is produced by plants during the process of photosynthesis. In photosynthesis, plants absorb carbon dioxide (CO₂) from the air and, using sunlight, convert it into glucose and oxygen (O₂). The oxygen is then released into the atmosphere as a byproduct.

2.Animals use oxygen for respiration. During respiration, animals take in oxygen to break down food and release energy, and in the process, they produce carbon dioxide as a waste product, which is then released back into the environment.

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