Question

4. How is friction useful in helping us walk​

Answer 1

Answer:

To avoid gravitational accidence

To have a good health

Explanation:

We walk in earth as earth have friction in gravity, we feel free, release oxygen, and being healthy by walking on the ground, the earth's friction holds our body so we do not need to fear of falling up or down. Walking on earth is useful and improve our body by the friction present everywhere on the land, soil, hills etc.

There's no friction on moon, so imagine that you're living there, you may face many problems of moving and roaming, not proper walk without using your feet, which your legs become lazy.

Thank you!

my own answer, no copied :)