This bicycle had two wheels of the same size. The alignment of the front wheel was fixed. There were no pedals, so the bike was propelled by pushing off with your feet and the bike was steered by leaning. strider bike
cruiser
hobby horse
mountain bike

The correct answer is - hobby horse.

Explanation:

The hobby horse is the ancestor of the modern cycle which was invented by Von Dorin in 1817. This was way different to the modern bicycles as hobby horse bicycle had the bicycle with two same size wheels and the front wheel was in fixed alignment and there was no pedal attach to any wheel and itis driven by propelling it by pushing off with feet of the driver

It was the starting of the new era of man drive vehicle which was name after the toys of a child, hobby horse. By adapting the changes time to time by various engineers/scientist it becomes modern