Answer:
You must be taking an test. Anyways the interesting thing about the heart it is the size of an adult fist.
<span>The best answer would be letter D. Walking on the treadmill is easy but the hard part is being consistent with your routine in order to maintain cardiovascular health. As Bethany goes on walking on the treadmill, the activity becomes familiar which leads to boredom. She needs to explore other physical activities so that excitement and the interest will still be there.</span><span />
Answer:
Passing a difficult math test!
Explanation:
