Final answer:
The infestation of head lice on the scalp is called pediculosis capitis.
Step-by-step explanation:
The correct answer is pediculosis capitis.
Pediculosis capitis refers to an infestation of head lice on the scalp. Head lice, scientifically known as Pediculus humanus capitis, are parasites that live on human hair and feed on blood from the scalp. These lice lay their eggs at the base of hair fibers, causing itching and discomfort.
It's important to treat head lice promptly to prevent their spread to others. Treatment usually involves using special shampoos or lotions that kill the lice and their eggs. Combing the hair with a fine-toothed comb can also help remove the lice and nits.