Friction is necessary for wheels to rotate and nails to keep in walls.
I am not sure that it is particularly helpful!
In some ways, yes.
they can kill you
It's in yogurt
by cheese cakes
p and s
Well it can be helpful in many ways for example in find cheaper solutions for gathering energy,growing food etc.
Hi, they are helpful because, they can help you breath aswell as protecting your delicate heart.
In the same way as it is helpful now, and many more new ways that have yet to be discovered.
When they smile, they make me happy.
dandelion
they can be help so many ways like in humansintestine aid in the digestion of certain food.