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. Monarch butterflies have an exoskeleton and six legs. Monarch butterflies use their wings to migrate, or travel back and forth, across thousands of miles every year. They fly from Canada or the United States to Mexico in the late summer and fall. Monarch butterflies use their one pair of antennae to help keep them flying in the right direction.
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.
From the given choices, choose the correct answer and respond with the letter of that choice.

A