Why should we change worn out tyres. Topic》Frictional force​

Explanation:

With a greater likelihood of losing traction and tyres blowing out, nothing is more dangerous than driving with worn-out tires. By doing so, you put yourself and others at risk. Whenever you notice significant tread wear, you need to immediately replace your tyres.

Explanation:

it loses air pressure...

and low pressure can result in tire blowouts which can cause lost of control of your vehicle

i think the answer would be reserve.