Question

1. classify each arthropod as an insect or crustac

Explanation:

Insects have three main body parts (head, thorax, abdomen) and six legs. Crustaceans often have multiple legs and are commonly found in aquatic environments. The shrimp has multiple legs and is a crustacean. The butterfly has three body parts and six legs (in adult form, though caterpillar stage has more pro - legs but adult is key for classification here) and is an insect. The ant has three body parts and six legs and is an insect.

Answer:

Shrimp: Crustacean; Butterfly: Insect; Ant: Insect.