Final answer:
Grasshopper and dragonfly undergo incomplete metamorphosis, while butterfly and frog undergo complete metamorphosis.
Step-by-step explanation:
The species that undergo incomplete metamorphosis are the grasshopper and the dragonfly. In these species, the young ones, called nymphs, resemble miniature versions of the adults and go through several molting stages. They grow larger with each molt until they reach adulthood. They differ from species that undergo complete metamorphosis, such as the butterfly and frog, where there are distinct larval stages before transforming into their adult form.
Learn more about Metamorphosis