Barter system- A method of exchange when no money is involved.
B and C can't be the answers because they are not exchanging anything.
D can't be the answer either because there is money involved.
So your answer is A) You trade an apple for a banana at school. because you are exchanging something with someone for something else thats not money.
Hope this Helps!!
<span>an elected legislature in various countries.</span>
<u>Answer:
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Following Germany's unprovoked attack on Belgium in violation of Belgian neutrality, Great Britain declared war on Germany is a TRUE statement.
<u>Explanation:
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- The treaty that was signed between Great Britain, Germany and a few other nations regarding the neutrality of Belgium in 1839 was breached by Germany in 1914 by invading Belgium through an unprovoked and spontaneous military action.
- The German Confederation despite being a signatory to the treaty that ensured the protection of Belgium's neutrality attacked Belgium. This action was not welcomed by Great Britain and was responded to by calling a war against Germany.
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:
Black Death was an epidemic of bubonic plague, a disease caused by the bacterium Yersinia pestis that circulates among wild rodents where they live in great numbers and density. Plague among humans arises when rodents in human habitats, normally black rats, become infected.
Explanation:
