What type of molecule is providing energy for this biological process?

Adenosine 5'-triphosphate, or ATP

Adenosine 5'-triphosphate, or ATP

Explanation:

ATP is the principal molecule for storing and transferring energy in cells. It is often referred to as the energy currency of the cell and can be compared to storing money in a bank.

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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.