which of these indicates a physical change that occurs during the process of digestion?

A. The breakdown of food substances by digestive juices, Your digestive system, a group of organs that convert food into digestible nutrients for your cells.

There are two main ways that digestion happens: physical and chemical. In physical digestion, your body mechanically breaks down food, grinding or smashing it into smaller pieces. However, during chemical digestion, enzymes, or tiny proteins, alter the structure of the food, which is made up of lots of atoms linked together. When your body employs chemical digestion, the bonds between certain atoms are broken, liberating smaller molecules to be taken to your cells. Although your digestive system has additional organs that perform crucial functions,

Which of these indicates a physical change that occurs during the process of digestion?

A. The breakdown of food substances by digestive juices

B. The addition of acids to create a ball of food

C. The secretion of pepsin to change proteins to peptides

D. The squeezing of food through the intestines

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