The process in which complex substances are broken down into simpler ones is referred to as

The process in which complex substances are broken down into simpler ones is referred to as "catabolism". Catabolism is a type of metabolic process that breaks down large molecules (such as carbohydrates, proteins, and fats) into smaller molecules (such as glucose, amino acids, and fatty acids) to release energy that the body can use for various functions. Think of it as like breaking down a big puzzle into smaller pieces, which can then be used to create something else. For example, when you eat food, your body breaks it down through catabolism into simpler molecules that can be used for energy, growth, and repair.