Answer:
It's caused by the glucose in the meals you eat! The molecular connections between glucose molecules store energy. Following the digestion and transfer of glucose to your cells, a process known as cellular respiration releases the stored energy and turns it to energy that your cells can use.
Step-by-step explanation:
Most carbs in our diet are broken down by the body and converted to glucose, a kind of sugar. Our cells' primary source of energy is glucose. When the body no longer requires glucose for energy, it is stored in the liver and muscles.