Lice attach to human hair and enjoy the warmth given off by the human. They eat
tiny amounts of human blood, causing the human to have little red bumps that
are quite itchy. They may also transmit diseases to a human.

A mutualism
B commensalism
C competition
D parasitism

Parasitism

Explanation:

The only creature that is benefiting are the lice while the human is slightly being harmed making this an example of parasitism.

hope that helped some

air enters through the nose, moves through the nasal cavity, the pharynx, the larynx, enters the trachea, moves through the bronchi andbronchioles till the alveoli.

osteogenesis imperfecta (oi) refers to a congenital ailment of bones. in the condition, the bones become brittle or fragile. this ailment is a general result of the defect or mutations in the genes (colia1 or colia2). this mutation results in imperfect collagen formation either in quantity or quality wise.  

there are eight kinds of oi defects, and each kind varies with certain distinctions in symptoms. the usual symptoms include frequent bone fractures, loss of hearing in infants, protruding eyes, discoloration of the white in the eyes, respiratory issues, loosening of the joints, short stature, and other symptoms.