<span>you're performing cardiovascular exercise,
you don't work at too high an intensity level,
your heart is strengthened</span>
A. A UNIT OF ENERGY SUPPLIED BY FOOD.
A calorie is a unit of energy. Historically, scientists have defined "calorie" to mean a unit of energy or heat that could come from a variety of sources, such as coal or gas. In a nutritional sense, all types of food — whether they are fats, proteins, carbohydrates or sugars — are important sources of calories, which people need to live and function.
Is this true or false if it’s is than this is a true fact
