What is an instar in insect development?

An instar refers to a developmental stage of an insect that occurs between two molts. As insects grow, they undergo a series of transformations during which they shed their exoskeleton, a process known as molting. Each instar is characterized by a particular size and form, and after an instar period, the insect will molt and move on to the next instar stage. This process is essential for the growth and development of the insect, allowing it to progress through its life cycle, which may include multiple instars before reaching adulthood.

The correct choice emphasizes this pivotal aspect of insect development, highlighting that an instar specifically denotes the intervals between these molting events. By contrast, the other aspects related to dormancy, pupation, or larval feeding stages don't correctly define what an instar is, focusing instead on different life cycle stages or behaviors that do not capture the essence of what an instar represents.