An unlabeled hierarchical diagram of some astronomical bodies is shown. the labels a, b, c, and d can be used to represent galaxies, solar system, clusters, universe, and planets.

part 1: which four astronomical bodies would you choose to represent the four labels in the diagram?
part 2: justify your choice based on the hierarchical relationships in astronomical bodies.

A: Universe

B: Clusters

C: Galaxy

D: Solar Systems

I put it in this order because D is smaller and darker and rounder like a planet. D is the solar system because it contains the planets. C is the galaxy because it holds all of the billions and trillions of stars. B is clusters because the universe is contained with all the other galaxys. A is the universe because it contains the galaxy, the stars in the galaxy, the solar system, the planets in the solar system, and the all other galaxys.

any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.

the correct answer to this question is #5