Final answer:
Retrograde transport indicates vesicle trafficking is true.
Step-by-step explanation:
Retrograde transport is a type of vesicle trafficking that occurs inside cells. It involves the movement of vesicles from the nerve endings back to the cell body. This transport is powered by an ATP-dependent motor protein called dynein, which moves the vesicles along microtubule tracks in the opposite direction to anterograde transport. Therefore, the statement 'Retrograde transport indicates vesicle trafficking' is TRUE.