Explain why ALL cormorants are or are not flightless.

These cormorants evolved on an island habitat that was free of predators. Having no enemies, taking its food primarily through diving along the food-rich shorelines, and not needing to travel to breeding grounds, the bird eventually became flightless.

Explanation:

answer; i believe its echoic memory,it is believed to last three to four seconds; good luck

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.