During photosynthesis, plants use (what) obtained from animals.

Carbon dioxide.

Explanation:

Plants use carbon dioxide from atmosphere and water from soil which is converted into glucose in the presence of sunlight. The light energy is converted into chemical energy.

The process of respiration makes carbon dioxide available in the atmosphere which is used by plants for this process.

Hence, carbon dioxide is the correct answer.

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if you add everything up correctly you should get 69 i got this because 50 plus 19 is it