Answer the following question given this paragraph: 

The somatic nervous system also controls some unconscious movements called reflexes. A reflex is a very rapid motor response that is not directed by the brain. In a reflex, nerve impulses travel to and from the spinal cord in a reflex arc, like the one in Figure below . In this example, the person jerks his hand away from the flame without any conscious thought. It happens unconsciously because the nerve impulses bypass the brain.


Q: What is the term for a  very rapid motor response that is not directed by the brain?

 Choices:

- instinct

- adaptation

- sensor

- reflex

A:
reflex
