Answer:
Option B. The marine biologist needs to make adjustments to his monitoring devices because from 0 to 1.000 meters, sound travels at a slower speed in cooler water.
Step-by-step explanation:
In water, the higher the temperature of the molecules creates a medium that allows sound to travel faster, in fact, sound travels abut 15 feet per second faster for every 1.8 degrees Fahrenheit rise in the temperature of water. This is the reason that as the biologist's vessel travels to cooler waters, he needs to make adjustments to his monitoring devices.