The answer is caterpillars and maggots.Concept:Insect:An insect is a species of the phylum arthropod.The body is divided into 3 parts: head, thorax, and abdomen.3 pairs of thoracic legs are present.It is the adult stage of the larvae.Examples: butterflies, beetles, flies.Larvae:This is a stage in many animals' development that occurs after birth or hatching but before they reach adulthood.This stage comes before pupa/cocoon after egg.It is the 2nd stage of the life cycle.Most larvae are soft and white or grey.Example- caterpillar, maggots, grubs.Explanation-Caterpillar: Caterpillar body is divided into multiple segments. Body is cylindrical shaped.Fleshy abdomen presentExternal layer mainly thin and soft.It is the larval stage of the butterfly.?Maggots:It is the larval stage of a fly.No leg presentThe outer body part is soft Its colour is mainly white or sometimes light brown.For feeding, they have a hook-like part in their mouth.Maggots and Caterpillar both are in the larval stage.Hence, the Maggots and Caterpillar are the right pair of examples of insect larvae.Additional InformationIn this question, the first option is maggots and beetles, where a maggot is a larva of a fly, but beetles are insects.In the second option, a caterpillar is a larva of a butterfly, but a fly is an insect.The third option there is beetles and flies. These are both insects, not larvae. Maggots and beetles- Incorrect answerCaterpillar and flies- Incorrect answerBeetles and flies- Incorrect answer