What are the various energy transformations that occur when you are riding a bicycle?
A) Muscular energy to kinetic and heat energy
B) Mechanical energy to chemical and light energy
C) Chemical energy to internal energy
D) Rotational energy to muscular energy

Hint:Firstly when paddling a bicycle, muscle energy is converted into kinetic energy as the bicycle travels, so the movement of the wheel generates friction that causes the loss of kinetic energy in the form of heat.

Complete step by step answer:
Here,
From the definition of Muscular energy we know that,
The conscious flow of energy along the lines of the body is muscular energy, drawing muscle to bone and binding limbs to joints as the energy travels ever inward to the centre of the body. Therefore,when riding a bicycle the rider's physical energy is converted to the bicycle's heat energy and kinetic energy.
Heat energy heats the body of the rider. Kinetic energy provides the bicycle with the pace to travel in rotation. The transformation can be shown as:
Muscular energy \[ = \] kinetic energy \[ + \] heat energy
During transformation, the total energy remains conserved. Hence,the various energy transformations that occur when you are riding a bicycle are muscular energy to kinetic and heat energy.
So,the correct answer is (A).

Note: Kinetic energy is a type of energy possessed by an entity or a particle because of its motion. If work is performed on an object by applying a net force, which transfers energy, the object accelerates and thus receives kinetic energy.
Heat energy is the product of the movement of the small particles in solids, liquids and gases called atoms, molecules or ions. They can transfer heat energy from one object to another. The transition or flow is called heat, due to the temperature difference between the two objects.