please help me on this awesome question

Answer:
The answer is 3, it can slow breathing and the heart, and even lead to death.
Answer:
Using prescription sedatives and tranquilizers with other substances — particularly alcohol — can slow breathing, or slow both the heart and respiration, and possibly lead to death. Continued use can lead to physical dependence and — when use is reduced or stopped abruptly — withdrawal symptoms may occur.
Explanation: it should be number three or the third one down, slow breathing, and the heart, and death.