Question

why should potted plants kept indoor be kept in the sun after every few days

Answer 1

as it absorb sunlight and make its own food to survive

Answer 2

It is because, they are indoor plants and they are kept inside a house. And inside, there's no sunshine, so you must keep it outside in the sun, after some days. Plants need sunlight as it is an essential element needed for the process of photosynthesis. If not kept, they wont be able to perform the action and may also die.

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Additional Information:-

Outdoor plants are plant that are kept outside and they can't survive inside in between the four walls.

Indoor plants are needed to produce oxygen, they are mostly green plants.

Photosynthesis is the process by which plants make food with the help of sunlight, water, carbondioxide and chemical.