I believe it's lipids and carbohydrates, carbohydrates storing energy as glycogen.
A cow eating grass in a field would be one
Enzymes are proteins, so the answer is enzymes
Mitochondria are the "powerhouses" of the cell, breaking down fuel molecules and capturing energy in cellular respiration.
Chloroplasts are found in plants and algae. They're responsible for capturing light energy to make sugars in photosynthesis.
Mitochondria and chloroplasts likely began as bacteria that were engulfed by larger cells (the endosymbiont theory). I hope it helped.