What are thylakoids? I will give BRAINLIEST!!

each of a number of flattened sacs inside a chloroplast, bounded by pigmented membranes on which the light reactions of photosynthesis take place, and arranged in stacks or grana.

Thylakoids are membrane-bound compartments inside chloroplasts and cyanobacteria. They are the site of the light-dependent reactions of photosynthesis. Thylakoids consist of a thylakoid membrane surrounding a thylakoid lumen. Chloroplast thylakoids frequently form stacks of disks referred to as grana.

Explanation:

They are membrane-bound compartments inside chloroplasts (the food producers of the cell) and cyanobacteria (group of photosynthetic bacteria).

c. live where it’s cold and icy

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