Answer:
a person who publicly supports or recommends a particular cause or policy.
Explanation:
The answer is: [C]: pure sociology .
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Note: "Pure sociology" is also known as "basis sociology".
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Your body breaks down food into protein in which the protein will then help to heal any problems your body has, like a broken bone. Protein can also help your bones to gain more strength, if your bones are stronger they are less likely to break.
For the second question, I think you're asking what are your nose and ears supported by, and if you are I think the answer would then be "cartilage."
I hope these answers helped you. :)