Answer:isa. an unconditioned stimulus.
Explanation:
According to classical conditioning , the unconditioned stimulus (UCS) is the one in which our response occurs naturally , automatic and unconditionally which means we don't learn how to respond.
For example a smell of your favourite pizza will immediately make you feel hungry because it actual triggers this automatic response from you. The smell of food is the unconditioned stimulus.
In Ivan Pavlov's classic experiment with dogs, when the dog smell their food , the salivating that result from them is an unconditioned response and food is the unconditioned stimulus, it an unlearned response that takes place naturally. This is the same as the meat powder above , which is the dog food.
 
        
             
        
        
        
Answer:
 Copper:
Copper compounds produce blue colors in fireworks. Although Copper has a red appearance in solid form, when it’s set alight it creates stunning blue fireworks. Copper is used in electrical wire and roughly half of all copper mined is used for this purpose.
 
        
             
        
        
        
The proper answer in your case is D ok by 
        
             
        
        
        
Answer:
they refused to allow southern representative and senator to take their seats in Congress
 
        
             
        
        
        
Answer:
The two factors that contribute to a detrimental relationship are infidelity and lack of communication. Further Explanation: Detrimental relationship is a type of harmful relationship that may hurt a person in a relationship. Detrimental is something that has a damaging and harmful effect on someone or something.
I hope that this helped you ;)