Which type of milk contains the least calories?

Nonfat milk is the type of milk that contains the least calories among the choices provided. This is because nonfat milk has had all of the cream (fat) removed, which greatly reduces its overall calorie content. In contrast, whole milk contains a higher percentage of fat, leading to a higher calorie count. Half and half, being a mixture of whole milk and cream, also has more calories due to its fat content. Almond milk, while typically lower in calories than whole or half and half milk, can vary greatly based on the brand and added ingredients, but it often still contains more calories than nonfat milk. Thus, nonfat milk stands out as the option with the least number of calories due to its lack of fat.