The interesting this about the people oft he Ancient Indus Valley is that the people seem to have just disappeared, and historians and archeologists cannot figure out what happened.
Native American tribes, weather, the tail itself, illness, loss of food or cattle, and the distance of the trail for the time people were walking.
Every normal cell of the body.
Answer: Unconditioned Stimulus
B) Conditioned Stimulus
Explanation:
In Classical conditioning, learning occurs when a neutral stimulus is paired with an unconditioned stimulus, the neutral stimulus becomes a conditioned stimulus which can bring about conditioned responses.
For example, unconditioned stimulus (food) is presented repeatedly just after the presentation of the neutral stimulus (bell). After conditioning, the neutral stimulus alone produces a conditioned response (salivation), thereby becoming a conditioned stimulus. From this example, if a dog salivates whenever it sees food but a bell is rung before the food is presented, Overtime just ringing the bell will make the dog to salivate.