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A boy with a thought bubble over his head. There is a dog wearing a spiky vest inside the bubble.
ISTOCKPHOTO/GETTY IMAGES (CHILD); COYOTEVEST (VEST)
Engineering,

Pointy Pup

Can you explain what's happening in this strange photo?

By Elizabeth Carney
From the September 2023 Issue
Other Focus Areas: Algebraic Thinking

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This dog’s spiky vest serves a purpose! Read the possible explanations below. Then pick the one you think is correct. Give three reasons to support your answer.

A.  The vest is a Halloween costume for dogs.

B. The vest protects the dog from predators such as coyotes.

C. The vest’s spikes and bristles make a back scratcher for larger animals.

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