sorry for my bad handwriting lol-
Unlike Static Stretching that is recommended for AFTER an exercise or athletic activity, Dynamic stretching can make a good warm-up before you are ready to preform. In dynamic stretching, you increase blood flow, increase the range of motion, and your joints get ready for movement. It focuses on different muscles.
Basically, doing dynamic stretching(which is moving your body while stretching), your body is prepared to move in actual athletic activity.
Pretty sure it’s B: oviducts
I’m sorry if this is wrong and plus I’m not completely sure but I am going to say C
The heart rate is different while dancing, studying and riding a bike because the amount of blood needed for each activity is different. Blood pumps as fast as it as needed by the cells, which is why riding a bike has fast heart rate while studying has a regular heart rate.