Question

how are scales are useful to lizards and snakes

Answer 1

The skin of snakes is covered in scales. Like human fingernails and rhinoceros horns, these scales are made of a strong protein called keratin. Contrary to popular belief, the snake's skin itself is not made of scales, but lies under the scales. Snakes use their scales for a number of different functions.

Answer 2

Scales help the lizards and snakes to make grip to the surface for their movement