Answer:
Protein and fats.
Step-by-step explanation:
Protein and fats are the best sources of long-term, stored energy in our bodies because these sources for a long time and body used these sources when there is no food for the body. First, the fats are broken down and releases high amount of energy which is used in different activities. When all fats are used then body used proteins present in our body for the generation of energy.