In Pavlov's early classical conditioning experiments, food was the , and a bell which was originally a neutral stimulus became a when paired with the food. A. unconditioned stimulus; conditioned responseB. conditioned stimulus; unconditioned stimulusC. unconditioned stimulus; unconditioned responseD. conditioned stimulus; unconditioned responseE. unconditioned stimulus; conditioned stimulus

Option A - Unconditioned stimulus, conditioned response

Explanation:

A conditioned response refers to the

to keep it profesional sex is the main way humans reproduce

explanation:

                                                        water

a colorless, transparent, odorless, tasteless liquid that forms the seas, lakes, rivers, and rain and is the basis of the fluids of living organisms.

                                                        halon  

any of a number of unreactive gaseous compounds of carbon with bromine and other halogens, used in fire extinguishers, but now known to damage the ozone layer.

                                                  dry chemical

extinguishing agent used on class a, class b, and class c fires.

                                                  carbon dioxide

a colorless, odorless gas produced by burning carbon and organic compounds and by respiration. it is naturally present in air (about 0.03 percent) and is absorbed by plants in photosynthesis.