Details: This poster shows a bicyclist riding into the sunset. At the bottom it says Challenges. Accep the challenges so tha tyou may feel the exhilaration of victory.
A challenge is a difficult task, especially one that the person making the attempt finds more enjoyable because of that difficulty. The bicycle, bike, or cycle is a pedal-driven, human-powered vehicle with two wheels attached to a frame, one behind the other. Bicycles were introduced in the 19th century and now number about one billion worldwide. They are the principal means of transportation in many regions. They also provide a popular form of recreation, and have been adapted for such uses as children's toys, adult fitness, military and police applications, courier services, and competitive sports. The bicycle has had a considerable effect on human society, in both the cultural and industrial realms.