Question

why do animal cell doesn't have cell wall​

Answer 1

All cells have cell membranes, and the membranes are flexible. So animal cells can have various shapes, but plant cells only have the shapes of their cell walls. 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.

Answer 2

because
they do not need them. the cell wall