Baby-sitting
the hernandez family has six
baby-sitters whom they call regularly.
four of the baby-sitters are boys and
two are girls. if they randomly call
one of the baby-sitters, what is the
chance that it will be a boy? can you show the work

He suggested a fact that a command is sent from the brain causing the contraction of muscles and the body to move.

Explanation:

The sensory response is received from the skin, muscles, vision and make a guess. The sounds may consists of a large amount of misinformation or noise these are incalculable variables.  These variables are difficult for the brain to recognize and work on the important information present in the sound. The brain goes through a lot of effort to reduce the negative consequences of the variability and noise.