What describes the three distinct stages of insects that undergo a gradual transformation?

The three distinct stages of insects that undergo a gradual transformation, commonly referred to as incomplete metamorphosis, are accurately described by the sequence of egg, nymph, and adult.

In this process, the insect starts as an egg, which hatches into a nymph—a stage that resembles a smaller version of the adult but lacks fully developed wings and reproductive structures. The nymph goes through several molts as it grows, gradually developing into its adult form. This progression is characterized by a series of changes that do not involve a pupal stage, thus distinguishing it from complete metamorphosis, where an insect goes through larvae and pupal stages.

Other options refer to stages involved in different metamorphic processes or incorrect sequences, making them unsuitable for this particular description. Understanding the life cycle stages is crucial for appropriate pest management and control strategies in both residential and commercial settings.