Final answer:
The order of forces from greatest to least in terms of human tolerance is inertial force, centrifugal force, and gravitational force. This order corresponds to Option D.
Step-by-step explanation:
In regards to human tolerance, the correct order from greatest to least of the forces would be Option D, which states: "1-Inertial force, 2-Centrifugal force, 3-Gravitational force." This ordering reflects the real-world experiences and forces we face. For example, astronauts experience up to 3 G-forces during shuttle takeoff and reentry whereas fighter jet pilots can endure up to 12 G's during sharp turns due to inertial forces. In contrast, gravitational forces are what we experience daily on Earth, and while they might seem prominent, we are well adapted to resist 1 G without any issues, making it the least in terms of immediate human tolerance.