Answer:
Your life purpose consists of the central motivating aims of your life—the reasons you get up in the morning. Purpose can guide life decisions, influence behavior, shape goals, offer a sense of direction, and create meaning. For some people, purpose is connected to vocation—meaningful, satisfying work.
GreekMythology.com or try wikepedia
Decompression sickness manifests ITSELF with joint pain and it can be fatal.
'Itself is a word that is usually used as the object of a verb or preposition to refer to to an inanimate thing or an animal which has been mentioned previously as the subject of the sentence.
The thesis statement that I think would be best for an analytical essay would be answer choice: D. Data on the sun's effect on human behavior shows a direct correlation between exposure to the sun and contentment. Hope that helps.