Average heights of American men and women have increased steadily since the 1940s.What is the best explanation for this observation?

Question

Quizplus · Accepted Answer

The steady increase in height since the 1940s is likely due to improvements in nutrition and healthcare, leading to a better overall standard of living, which can impact growth and development. This is an environmental change rather than a result of genetic drift, artificial selection, or crossing over. Additionally, height is a polygenic trait influenced by multiple genes, so its expression can be influenced by multiple factors including diet, stress, and lifestyle.

Average Heights of American Men and Women Have Increased Steadily