Which of these is a controllable risk factor for disease? a)age b)sleep habits c) climate d)poverty

I would choose the second choice, or B. "Sleep habits."

Age, climate, and poverty is not something that an individual would have control over. However, you can easily adjust your own sleep habits.

The fetus at this stage is curled up, almost doubled over, so remember to consider this as you draw the fetus the correct length