By contracting, muscles pull on bones and allow the body to move. Muscles can only contract. They cannot actively extend, though they can move or relax back into the non-contracted neutral position. Therefore, to move bones in opposite directions, pairs of muscles must work in opposition
Answer:
I would say the answers B
Explanation:
The answer is B since it says "The Medieval form of tennis is termed as real tennis, a game that evolved over three centuries, from an earlier ball game played around the 12th century in France which involved <u><em>hitting a ball with a bare hand</em></u> and later with a glove."
Although it says "later with a glove" the key word is later so originally they played with their bare hands which means the answer is B.
<u><em>Hope this helps</em></u>
The brown stuff is called plaque. This forms on your teeth when you eat and its something you can't get rid of. There is tooth paste that can help maintain it.
