During exercise, stored chemical energy is converted to energy that can be used for
muscle movement
bone development
ligament repair
blood vessel dilation

The right answer for this question is that during exercise, stored chemical energy is converted to energy that can be used for muscle movement. The particular chemical that is used for muscle movement is known as ATP, or adenosine triphosphate.

During exercise, stored chemical energy is converted to energy that can be used for muscle movement.

Best answer choice is:

A. muscle movement 

Muscles use the stored energy of food we tend to eat and convert that to heat and K.E. The supply of energy that's used to power the movement of contraction in operating muscles is termed adenosine triphosphate (ATP). The ATP is outlined because the body's organic chemistry way to store and transport energy. 
However, ATP isn't kept to a good extent in cells. Therefore, once contraction starts, the creating of additional ATP should begin quickly.

It would be 23 beats per second

I’m going to guess these are the choices: a) recreational skiing developed in the mid-19th century b) it was originally invented as a way of getting from place to place in snowy regions c) downhill skiing is currently the only common form of the sport d) it mostly evolved from snowshoeing- if that’s the cases then the answer would be c) downhill skiing is currently the only common form of the sport