Those options are very odd because none of those options are the reason the planets in out solar system revolve around the Sun. The real reason is because the Sun's gravity is pulling on the planets. However, if I had to choose one it would be the Sun is the most massive object in out solar system.
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The effects of many diseases may also be directly incapacitating, which cause people lacking health care, to lay sick during the viraemic or parasitaemic phases, rendering them more prone to further vector bites and causing increased infection rates in the vectors
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Proteins seem better suited for storing genetic information because DNA is only made from 4 bases while proteins were made from 20 amino acids, Scientists thought that proteins could code for much greater variety in their amino acid sequence than DNA could in its nucleotide sequence.
7.960 x 10 to the 3rd power :)