Question

the four main categories of pieces in the vex iq system are _______.
beams, plates, angle beams, and connectors
electronics, structural components, fasteners, and motion components
corner connectors, shafts, motion components, and beams
electronics, wheels, pulleys, and drivetrain

Explanation:

The VEX IQ system has four main piece - categories which are electronics for control, structural components for building the frame, fasteners for joining parts, and motion components for movement.

Answer:

B. Electronics, structural components, fasteners, and motion components