Digestion I’m not sure but I think this is the answer
Digestion is the transformation of food into assimilable substances, carried out in the digestive or digestive system, by two types of processes: mechanical (performed with chewing, swallowing) and chemical (where food is broken down into smaller particles thanks to the action of enzymes present in the digestive juice, undergoing changes in its chemical composition).
In other words, we can say that digestion is the process where nutrients are absorbed by the body.
It's digestion. That's how the body absorbs energy from the food we eat