Answer:
Globular cluster
Explanation:
A globular cluster is a spherical collection of stars. Globular clusters are very tightly bound by gravity, which gives them their spherical shapes and high stellar densities toward their centers.
The answer is: A- climax community
A.
contracts to move substances through the body
D.
breaks down food to acquire nutrients
They are further classified into: fish, amphibians, birds, reptiles and mammals.
I hope I've helped : )