Why do plant cells have a cell wall?

Plant cells have cell walls around them, and animal cells don't have cell walls.The cell walls give plant cells their boxy shapes. ... That's nice for plants, because it gives them the ability to grow up and out, where they can get lots of sunlight for making their food.Sep 22, 2011

Explanation:

a. decomposes use carbon from dead organisms as fuel for cellular respiration, returning carbon dioxide back into the atmosphere.