__ behavior is inherited and programmed in the genetic code. When a deer hears a sound in the forest, such as crackling footsteps, it immediately freezes and then bolts through the bushes. This is an example of the response. Mating rituals or displays can be very complex but are also behaviors.

Innate; fight or flight; innate

Explanation:

Innate behavior also referred to as the

instinctive behavior is simply referred to as a behavior that's inborn and therefore occurs naturally to an animal or human being. Innate behavior are usually triggered by a particular stimulus. Innate behavior aren't learned as it's natural.

The fight or flight response is referred to as a response that occurs when an individual or animal is faced with a situation that makes it either stressed or afraid. Due to the perceived threat, the sympathetic nervous system of the human being or animal will be activated which prepares the body to either to fight or flee.

your body is trying to warm itself up. or more precisely, sensors in your skin send messages to your brain to generate heat to your body.

that is wrong, its not thymus.