Slimes perfectly said to me.
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d . different population of the same species physically separated from each other forming new species.
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At the bottom you have the producers aka auto trophic livings (which use inorganic compounds to grow, produce energy, matter and so on..). These organisms would be plants, Cyrano bacteria, over all any organisms that do photosynthesis.
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Hey there!
This can be explained using the conservation of angular momentum, which the planets get attracted to the sun because of its large size, and massive gravitational pull.
Let me know if this helps, or if you need a further explanation :)
