Answer:
b. motor neurons
Explanation:
According to medicine, a motor neuron is a neuron that transmits information from the brain to the body and that causes movement. In other words, this type of neurons carries an impulse from the brain to the body that will make a part of the body actually move. It is because of them that we can move and react in a physical way to the stimuli in the environment.
In this example, a young man reads that he just won $1000 and he literally jumps for joy. We can see that the muscles of his legs moved so he could jump. Therefore, the motor neurons had to carry the impulse from the brain to cause this movement. Thus, they are sending messages from his brain to his legs ordering them to jump.