I think the correct answer is crust. I am really sorry if I am wrong.
I believe the answer is a handful of wealthy farmers.
Terrestrial: Mercury, Venus, Earth, Mars
Gas: Jupiter, Saturn, Neptune, Uranus
Answer: Ameoba is a single-celled animal that catches food and moves about by extending fingerlike projections of protoplasm. Amoebas are either free-living in damp environments or parasitic. Amoeba: Also ameba. A single-celled (protozoan) organism that constantly changes shape. The word "ameba" is from the Greek "amoibe" meaning "change." Ameba can infect the bowels to cause diarrhea and the liver to cause abscess formation.
Purple could mean many things but if it's talking about climate and such then cooler colors like purple are usually meaning colder climate