Human growth involves several complex biological processes such as cell division, tissue development, and growth hormone regulation. It results in an increase in the size and complexity of the human body over time.

The changes that occur during human growth involve the formation of new cells and the enlargement of existing cells, as well as the production of additional molecules for structural components such as proteins and tissues. These processes require chemical reactions and transformations within the body to convert nutrients into energy and building blocks for growth. Therefore, human growth can be considered a chemical change at the molecular level.