Explanation:
The process of photosynthesis
Plants need food to respire, grow and reproduce. Unlike animals, plants are able to make their own food by the process of photosynthesis.
Photosynthesis takes place in the part of the plant cell containing chloroplasts, these are small structures that contain chlorophyll.
For photosynthesis to take place, plants need to take in carbon dioxide (from the air), water (from the ground) and light (usually from the sun).
Family reunification is a recognized reason for immigration in many countries because of the presence of one or more family members in a certain country, therefore, enables the rest of the divided family or only specific members of the family to immigrate to that country as well.
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The answer is b constant and unique
