The energy required for muscle contraction comes from
a. atp.
b. ligaments.
c. oxygen.
d. chlorophyll.

The correct answer is A.

Muscles need energy to produce contractions. The energy is derived from ATP (which stands for adenosine triphosphate) that is present in muscle cells.

Muscles tend to contain only limited quantities of ATP. When depleted, ATP needs to be resynthesized from other sources namely creatine phosphate (CP) and muscle glycogen. Other supplies of glycogen are stored in the liver.  The body is also able to resynthesize ATP from lipids, i.e. free fatty acids.  Different sources of energy are used depending on intensity and duration  of the workload .

the answer to your question is b

protein makes up the building blocks of organs, muscles, skin, hormones and pretty much everything that matters in your body.

some choices are:

peanut butter

seeds

eggs

yogurt

meats

fish

so pretty much meat, dairy, nuts, and grains.