Answer:
b.)contain the spread of communism
Explanation:
Okay so I'm not sure exactly if this is talking about primary or secondary sources, but if it is then I'm fairly certain that this would be a secondary source since the student wasn't there to witness it, they're relying on their research to give them information.
The answer is Dregg did delightfully on his Antarctic test because ... he knew it cold! This puzzle is a play on words; when somebody is fully set for every answer on a test, they can be said to "know it cold." At the same time the Antarctic is recognized for being, in fact, very cold. So in this joke Dregg knew all the answers about the cold weather of the Antarctic.
Studies regarding rat learning and brain structure by Greenough, et al. (1990) and Wallace, et al. (1992) suggest that: <u>Early experiences such as learning cause physical changes in the brain.</u>
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The brain structure is composed of three main parts: the forebrain, midbrain and hindbrain, each with multiple parts.The brain is housed inside the bony covering called the cranium. The cranium protects the brain from injury.
Brains structure are made of soft tissue, which includes gray and white matter, containing the nerve cells, non-neuronal cells (which help to maintain neurons and brain health), and small blood vessels.
learn more about Brain structure here
brainly.com/question/11139051
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