How can changes over time of the average height of the people in a country help to indicate the standard of living in a country?

Question

Quizplus · Accepted Answer

The Answer is A person's height partly relies on nutritional status, which depends on a person's food intake relative to the work the person has to perform, whether the person is able to remain warm in cold weather, and the diseases to which the person is exposed.Height, then, can be used as a measure of health and well-being, and therefore a measure of the standard of living.

How Can Changes Over Time of the Average Height of the People