Answer:
<u>It is generally believed that during certain periods of life the organism may be more susceptible to epigenetic changes. In particular, it is thought that during early life, changes in DNA methylation are more likely to occur.</u>
A sedentary lifestyle is a lot of sitting around and little exercise.
A active one is the opposite. Exercise, playing sports, etc.
Health problems like diabetes,arthritis, and even obesity.
A- is the answer :) goodluck! hope this helps!