The correct answer is C. Mirror.
When a person performs an action, the neurons which are activated and then sees another performs action are referred to as mirror neurons.
Mirror neurons are essential for imitation which is the known key for learning process. They are important because they help in planning our understanding and intentions which are behind actions.
They allow us to interpret an action. For example, it helps the cells in the brain to perform when a certain action is being performed.
Nutrients........................
