Context: Insects are a group of animals with similar traits. The following traits can be used to identify insects:
They have six legs.
They have an exoskeleton.
They have one pair of antennae. Observe the animals and read the descriptions.
Select the one animal that has all of the insect traits listed above.
A. Birdwing butterflies have an exoskeleton and six legs. Males are bright green and black, and females are brown or yellow. Both males and females have one pair of antennae.
B. Trichina worms have soft, thin bodies. They have a cylindrical shape and do not have limbs. Trichina worms are not made up of segments. They can infect and feed off of humans, pigs, and other mammals.
Pick the correct answer from the listed options and provide the letter of the selected option.

A