Physiologically, the higher a person's height, the smaller the ratio of body surface area to height (ratio, not absolute value), so the heat dissipation per unit area of a person will be smaller relative to the total body volume.

Therefore, the residents of high latitude countries and regions such as Europe and America are generally higher. For example, in the Netherlands, the national average height has reached male182m and female170m, which is the highest in the world.

The residents of low latitude countries and regions such as Africa and South Asia are shorter.

Most residents in the United States are descended from Britain and France, so their height is inherited from their genetic traits.

Their main food is:

Beef: protein and high fat are essential nutrients for muscles.

Chicken: Chicken is thick in fiber, easy to digest and easy to absorb nutrients.

Bread: mostly whole wheat bread, whole grain, nutritious and healthy.

There is much more beef than us. We drink a lot of milk and eat a lot of meat, cheese and other vegetables since childhood. Unlike our rice noodle staple food, the meat is neither cut into small pieces nor overcooked, and most of the nutrients are retained.