The best example of balanced forces is a Select one:

bus parked in a garage.

car increasing speed.

ball kicked along a flat surface.

roller coaster slowing down on an incline.

I think maybe it would be a bus parked in a garage because since the bus is parked, the balance of forces on the bus is 0 on both sides, the only force on it would be the downward force of gravity.

The common sense pamphlet i think