The differences between male and female sexes are anatomical and physiological. "Sex" tends to relate to biological differences. For instance, male and female genitalia, both internal and external are different. ... However, women have higher levels of estrogen and progesterone, and men have higher levels of testosterone.
<h2><em>Body Fat. I'm pretty sure it's Body Fat.</em></h2>
You didn't put any of the options but I would probably say something like because America is becoming obese and fat.
Answer:
the way you worded it is a little strange but the word I think you are looking for is holding.