Which developmental process does not involve a larval stage?

The developmental process that does not involve a larval stage is characterized as "no metamorphosis." In this process, organisms develop directly from egg to adult without any intermediate larval forms. This can be observed in certain species where the young resemble miniature adults and grow through simply increasing in size without undergoing significant changes in form.

In contrast, complete metamorphosis, also known as holometaboly, involves several distinct stages: egg, larva, pupa, and adult. This process is common in insects such as butterflies and bees, where the larval stage is crucial for growth and development.

Incomplete metamorphosis, meanwhile, entails a life cycle including egg, nymph, and adult stages. The nymph may look similar to a smaller adult and does not undergo a pupal stage, but it still represents a form of metamorphosis that includes stages prior to reaching the adult form.

Holometaboly, synonymous with complete metamorphosis, clearly requires a larval stage as part of its developmental process.

Thus, the only option describing a developmental pathway that completely bypasses a larval stage is "no metamorphosis."