A response is a to a stimulus. • A stimulus is anything that can cause an individual to respond or react. • Stimuli can be or .

A response is a _reaction to a stimulus. • A stimulus is anything that can cause an individual to respond or react. • Stimuli can be _internal or  external.

Explanation:

A  change in the cellular make up of an organisms due to response or reaction to a stimulus is called a response. This response can be due to a stimulus inside the  body , or due to effect of an external ( stimulus) object on the body-stepping on a sharp pin.

In either cases, the stimulus  is  receive by the receptors, which transfer the stimulus through the sensory neuron to the inter neuron in the CNS, for the motor neuron to bring an effective response at the effectors.

it is a learned trait

explanation:

age range would be the answer