An investigator's analysis of the root of a strand of hair has uncovered little DNA to analyze. They would likely conclude the owner over-treated their hair
the hair was shed naturally
the owner washed their hair rarely
the hair was removed violently

The hair was shed naturally

Explanation:

since it wasn't removed violently and fell out naturally no DNA was pulled out with it.

a chair, a bed, and a toothbrush

explanation:

i think its control and coordinate because im pretty sure thats what tissue does and the joints are what control movement and then your skeletal/ bones provides portection. hope that .