Question

7 which word describes the speed at which the \global conveyor belt\ moves? a rapid b supersonic c gradual d irregular

Explanation:

The "global conveyor belt" (ocean circulation system) moves very slowly, with water masses taking centuries to millennia to circulate. "Rapid" and "Supersonic" imply fast speeds, which don't match. "Irregular" refers to non - consistent movement, not speed. "Gradual" means slow and steady, fitting the conveyor belt's speed.

Answer:

C. Gradual