An unlabeled hierarchical diagram of various astronomical bodies is shown below. the labels a, b, c, and d can be used to represent the milky way, earth, universe, sun, and solar system. part 1: which four astronomical bodies would you choose to represent the four labels in the diagram? part 2: which astronomical body, other than the ones given, could also represent the label d? explain all your work

All planets have these same layers (From deepest to shallowest, inner core then the outer core, then the mantle, and lastly the crust. A good example is the Earth) that is shown in the diagram, even the sun has all the layers I just listed.
But, some planets I can think of are Mars, Venus, Moon, and the Earth of course.

Layer C. sounds like it could also represent Layer D, since they are so close.

P. S. I did my best to try to answer this.

Hola Amigo!! :D

The answer to you question is A. 

The Milk Way contains thousand of planetary systems. 

For Part 1:  I would choose A for Universe,  B for Milky Way,  C = Solar System  D-- Earth 

( A = Universe, B = Milky Way, C - Solar System, and D. Earth).

Part 2. You could choose any of which you choose for the planets such as Mercury, Venus, Mars, Jupiter, or a satellite.

Hope this helps!!

Have A Good Day!!