They both are used for natural species.
Part 1: The four astronomical bodies would you choose to represent the four labels in the diagram are (A universe B galaxy C solar system D Mars) because a universe holds galaxys and galaxys holds solar systems witch holds planets like Mars
<span>Part 2: The hierarchical level D is different from the rest because D or mars is a planet and unlike all there other astronomical bodies it dose not hold other astronomical bodies with in it. </span>
Answer:
so that you earth model can stay together like the real earth
Explanation: