3. For the sake of the logic and coherence of this paragraph, Sentence 1 should be placed:

Answer and Explanation

Your Answer is

Correct Answer is A

Explanation

S1 "Most people have heard of physical therapy, in which trained therapists help patients with physical difficulties recover." S2 "But not many people have heard of hippotherapy..." So S1 should be put where it is bit, in contrast to S2.