What term refers to the process of changes in shape, form, and size of an organism?

The term that refers to the process of changes in shape, form, and size of an organism is metamorphosis. This biological phenomenon commonly describes the transformation that certain organisms undergo during their life cycle, such as insects, amphibians, and some marine animals.

Metamorphosis generally involves distinct stages where the organism transitions from one form to another, illustrating significant changes not only in appearance but also in function and behavior. For example, the life cycle of a butterfly includes stages from egg to larva (caterpillar), pupa (chrysalis), and finally to adult butterfly, each stage showcasing a dramatic transformation.

While growth refers to an increase in size and mass, and adaptation pertains to changes that organisms undergo to better fit their environment, these concepts do not encompass the profound changes in shape and form that metamorphosis implies. Erosion, on the other hand, relates to the physical wearing away of land and does not pertain to biological changes in organisms. Thus, metamorphosis is the most accurate term for describing these transformative processes in organisms.