Head and body lice typically infest which part of the human body?

Head and body lice specifically target particular areas of the human body for their survival and reproduction. Head lice (Pediculus humanus capitis) are primarily found on the scalp, where they lay eggs and feed on human blood. They thrive in the hair and can often be found just behind the ears and at the nape of the neck. Body lice (Pediculus humanus corporis), on the other hand, are found on clothing and only move to the body to feed. They tend to infest areas where skin comes into contact with clothing seams, but are not directly associated with the scalp or face.

The choice that specifies both the scalp and body aligns with the known behavior and habitat of these lice. While other body parts such as underarms, feet, or face may occasionally experience irritation or contact with lice, they are not typical sites of infestation for head or body lice. Therefore, stating that head and body lice infest the scalp and body accurately captures the areas where these pests are commonly found on human hosts.