What are the source of energy for animal?

Animals primarily obtain energy through the consumption of organic matter, such as plants or other animals. This energy is derived from nutrients in their food, which are metabolized to produce ATP (adenosine triphosphate) during cellular respiration. Additionally, some animals can derive energy from symbiotic relationships with microorganisms that help digest food. Overall, the main sources are carbohydrates, fats, and proteins found in their diet.