One of your classmates moved to the United States from Somalia as a kid in the late 1990s. After seeing a picture of his family, you notice that he and his sister must have been undernourished for several years. You arrive at this conclusion because your classmate

You arrive at this conclusion because your classmate "and his sister are both much shorter than their parents."

Explanation:

As we start getting older, the bones begin to become thinner. Respectively of the vertebrae converts to become a little shorter. Therefore, so do we. With full-blown osteoporosis, people can lose several inches in height. The average height of a woman in the U.S. is about 5 feet, 4 inches, up about an inch in the last few decades, according to the Centers for Disease Control and Prevention. The study adds to growing interest in early-life events that influence adulthood.