Question

which is least often used to study the deepest parts of the ocean floor?
a. satellites
b. scuba divers
c. sonar

Explanation:

To determine which is least often used to study the deepest parts of the ocean floor, we analyze each option:

• Satellites can be used for broad - scale ocean floor mapping from space, especially for large - scale features.
• Scuba divers are limited by the depth they can reach due to pressure and oxygen constraints. The deepest parts of the ocean floor are at extremely high pressures and great depths that are far beyond the reach of scuba divers.
• Sonar (Sound Navigation and Ranging) is commonly used to map the ocean floor, even in deep areas, by sending sound waves and measuring their return.

So, scuba divers are least often used to study the deepest parts of the ocean floor.

Answer:

B. scuba divers