Calories indicate and measure the energy available in food. Fat is the
most calorie-dense food and carbohydrates are the body's preferred
energy source. Protein and carbs each contain 4
calories per gram and fat contains 9 calories per gram.
The leading causes of death in children under the age of 1 year are developmental and genetic conditions that were present at birth, as well as
conditions due to premature birth. Other notable causes are unintentional injuries which can be fatal and homicide.
