If you didn't have one, how would you work on anything mechanical.
In a braking system
Yes.
could someone please answer this
all you have to do is sometimes get usful
Smelting
They're useful because I'm awesome
The rosetta stone is used to read hierogyphics.
They are great for war and usful for research anf tourism.
Some species eat aphids and are considered very usefull.
because ruben morales talked about it
They are not but are something that a lot of pupils are familiar with. They are a usful tool for visualising fractions.
Animals are very useful. For example, they provide food, clothing, and companionship.