Koichi's father's specialty is cultural anthropology.
In order to get along with the African ethnic group that she wants to research, she started interacting with the villagers naked.
I wonder why your sister wanted to take an anthropology course.
The study of mankind (人類) is known as anthropology.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.