Answer:
happy
Step-by-step explanation:
a measure of energy in food, specifically the measure of heat needed to raise a kilogram or a gram of water by one degree Celsius.
2- From food and drinks, pretty much nutritional stuff you like intake, if that makes sense. Could do with energy as well though. Hope this helps.
3- your body needs calories to keep your heart beating and your lungs breathing
4-there is two types of calories a small Cal and a large calorie also known as