Which of the following is part of the metabolism process in the body?

The metabolism process in the body primarily involves the conversion of food into energy. This fundamental aspect of metabolism is crucial as it encompasses the biochemical reactions that enable cells to break down nutrients obtained from food. Through processes such as glycolysis and the citric acid cycle, carbohydrates, fats, and proteins are transformed into adenosine triphosphate (ATP), the energy currency of the cell. This energy is essential for numerous bodily functions, including muscle contraction, nerve impulse propagation, and overall cellular activities.

In contrast, the other options refer to different physiological functions. For example, the filtration of toxins is more aligned with the role of organs like the liver and kidneys, rather than a direct aspect of metabolic processing. The storage of excess nutrients, while related to metabolism, represents a different stage where the body stores these nutrients for future energy needs rather than actively converting them. Lastly, digestion of non-hazardous materials describes the breakdown process but does not specifically focus on the conversion of food into energy, which is the essence of metabolism. Therefore, the conversion of food into energy captures the primary definition and role of metabolism within the body.