Question

why do plants cells contain cell wall but animal cell do not?

Answer 1

Plant cells have cell wall because plants do not move from one place to another and hence they require rigidity which is provided by the cell wall but animal cells move. The cell wall if present in the animal cell will be a hinderance to movement.
Hope it helps!!!

Answer 2

Plant cell contain cell wall to protect themselves from outside condition i.e if there is a flood they can not go away from a place to another to protect but animal can or if there is a rain animals can hide or protect themselves from rain but plants have a fixed position.