Nearly all forests in have been cut at least once during the past 300 years, so very little original (virgin) forest remains.

In the United States.

Explanation:

It doesn't have very many original forests because people have been chopping them down and planting new ones.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.