During the exercise your body releases heat by a. using stored energy b. increasing breathing c. decreasing heart rate d. dilating blood vessels

The answer is "dilating blood vessels" or option D. What happen is when your doing physical activity it will increase your heart rate. (meaning it's not C) Then because of that your body will start to sweat which causes dilating blood vessels. Then it will cause your body to release heat. (meaning it's not options A, and B)

Hope this helps!

Hair follicles, blood, etc.

Hello! i believe that it is okay, but you should limit on how much you go in a jacuzzi, hot tub, sauna etc. the rise in temperature may effect the development of you unborn baby and could cause some birth defects most likely in the first 3 months or 12 weeks of pregnancy. the recommended amount of time to be in a jacuzzi while pregnant would be 10  minutes or less.i hope this !