Proteins are large biomolecules and macromolecules that are comprised of one or more long chains of amino acid residues.
Coronary or Congenital heart disease is the result of reduced blood flow to the heart due to narrow valve or valve defects. This defects may be caused by build up of fatty deposits. So the statement you have given is TRUE.
the answer is a. skin color
It strengthens your bones to be able to handle large amounts of pressure and weight on your body. I know this isn't related, but when a person breaks their ankle or something else they tend to heal quicker because they're athletes. So one way or another, increasing strength, helps to increase your capacity for exercising.