What is the series of changes through which an insect passes in its growth from egg to adult called?

The correct term for the series of changes that an insect undergoes from egg to adult is metamorphosis. This biological process involves different stages, typically encompassing the egg, larval, pupal, and adult phases. Insects that undergo complete metamorphosis progress through these distinct life stages, allowing significant transformation in form and function. For example, a caterpillar (the larval stage of a butterfly) undergoes metamorphosis to become a butterfly, involving not only a change in structure but also in behavior and ecology.

The other terms presented do not fit this context. Photosynthesis is a process by which plants convert light energy into chemical energy, unrelated to insect development. Morphosis seems similar but is not a recognized term specifically related to insect growth. Kinesis refers to movement in response to a stimulus, which does not describe the sequential changes in development like metamorphosis does. Thus, it’s clear that metamorphosis is the correct and specific term for the developmental process of insects.