Number of organisms per unit of living area A) Population density
B) Dispersion
C) carrying capacity
D) population growth rate

Explanation:

A) Population density

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the second type of galaxy is called a barred spiral, which has a thing called a bar straddling the nucleus

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above