30 points (also marked Brainlest)

Explanation:

2-They live in burrows that they dig into the soil. This helps

aerate the soil and improve plant growth.

Crab feeding and burrowing mixes nutrients into the soil,

which is also good for plants. (important)

Fiddler crabs also promote marsh

plant growth that is important for the protection of coastal

cities from hurricanes.

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.