How does the speed of sound change as the sound of a boat engine moves down to the depths of the ocean? (3 points) Question 47 options: 1) The speed gradually increases as the temperature of the water decreases. 2) The speed increases and then decreases as the temperature of the water increases. 3) The speed decreases and then increases as the pressure exerted by the water increases. 4) The speed gradually decreases as the pressure exerted by the water decreases