Lipids are more of a fatty, oily, and waxy substance that serve as long-term energy for whenever the body may need it. You can find lipids in oily foods such as salad dressing, olives, avocados, peanut butter, nuts, seeds, and some fish.
Proteins are enzymes that are used to strengthen and keep the body functioning. Proteins make up our bones, hair, skin, nails, and muscle, and without them our bodies wouldn't be strong enough to function or carry out even the simplest of tasks. Proteins are found in more animal-based foods such as meat, vegetables, grains, and seeds.
Carbohydrates are more of the sugary molecules that provide short-term or immediate energy for the body. They can be found in foods like bread, beans, milk, popcorn, potatoes, cookies, spaghetti, and soft drinks.