What are the two adjectives in the sentence dogs can detect sound at a higher frequency than humans; therefore, they hear high pitched noises that we can't

It's to know your purpose before you read something because a purpose can:

Fortify is a verb that means “to protect and strengthen.” a fortifications is a that means something that protects.

Which sentence contains a participial phrase that is placed correctly? -jose paid for a hamburger scanning the cafeteria for an empty seat -peeling off her winter jacket, sierra settled into the cozy armchair. -made of soft wool, nadia pulled on a blue sweater -the cowboy jumped from the horse laughing in the face of danger