Which of the following determines the sucess or failure of a species

D. All of the above.

If the rate of reproduction were to come to a halt, the species would begin to die out, especially if it didn't begin to regulate once again.

The amount of food supply is vital for a species to survive, as anything can die of starvation.

If there are more natural enemies than there are the said species in the habitat, the species will not survive as they will be hunted.

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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.

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