How does Ackermann Steering improve on the Tricycle Drive?

What are some advantages to a 4 Omni Wheel designed robot?

What advantage does a Tracked Robot have over a wheeled robot?

If you were going to a build a robot to be used on a rocky terrain, which type of movement would you want to use and explain why.

If you were going to build a robot to be a car, which type of movenment would you want to use an explain why.