Final answer:
The object used in playing the organ and propelling a bike is a pedal, which is used to produce notes on the organ and to move the bike forward by the rider's feet.
Step-by-step explanation:
The question asks to identify an object that is used both when playing the organ and propelling a bike. The correct answer is A) Pedal. Pedals are found on both organs and bicycles. On an organ, the pedals are used by the player's feet to produce musical notes. In a bicycle, the pedals are the part that the rider turns with their feet to move the bike forward. Both instruments require the user to push on the pedals to operate.