15. The writer wants to divide this paragraph into two in order to separate the discussion of gippotherapy positions from the discussion of the emotional link between horses and hippotherapy patients. The best place to begin the new paragraph would be at the beginning of Sentence:

Answer and Explanation

Your Answer is

Correct Answer is C

Explanation

The first part of the question stem requires a discussion of the hippotherapy posture, and the second part is a discussion of the emotional connection between the patient and the horse. S1-3 are all about positions, and S4 is a further explanation of S3. Mention emotional connection from S5 (are drawn to "attracted by") so should be segmented before S5.