Bleeding disorders can result from the lack of
O
vitamin B12
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vitamin D
O
vitamin A
vitamin K
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vitamin C

Bleeding disorders can result from the lack of vitamin K

Explanation:

Vitamin K is a fat-soluble vitamin critical for proper blood clotting. Deficiency is associated with easy bleeding. Besides its role in blood coagulation, vitamin K is also important for healthy bones. Symptoms of deficiency include:   Nose bleeds  Easy bruising, Bleeding gums,  Heavy menstrual bleeding , and Blood in the urine.

it also supports my hypothesis. if you rest first you can squeeze the clothespin more times. from the data i collected the average of the eight people concluded exercise makes your muscles more fatigued and less able to squeeze the clothespin compared to resting before squeezing.

clumped distribution, because you'de have all of the population gathered in a relatively small are.

it's the most common because it provides protection and a mate for reproduction

example: humans, seeweed, cattles, etc.