It displays a behavior called reinforcement
<span>Many people hope that the government will fix the problem. </span>
Answer: Aggregate
Explanation: All these people who found themselves in the same place because of a certain occasion, and at the same time of course, but in that case, these people are most likely to see each other for the first time, or if not for the first time then they may have seen each other earlier in the passage, but there is no no connection between them.The only connection is that they are in the same place at the same time. It is an aggregate, therefore not a group of people, because all these people are caught by the music playing by these two musicians, so they stopped to hear them but are not connected to each other. Same as in a restaurant or market.
Answer: A header is the top margin of each page, and a footer is the bottom margin of each page. Headers and footers are useful for including material that you want to appear on every page of a document such as your name, the title of the document, or page numbers.
Answer:The answer is b (contained in)
Explanation:Derivative Classification refers to the process of restating in a different and often new form previously classified information, and ensuring the newly outcome (material) is consistent with the previous original information and contains the source markings .
In the example given above ,option b is more suitable because the new outcome which is 40,000 is a part of the source marking ,we derive the figure based on the source .
Therefore we say ,it is contained in the source
Option d is incorrect because classification by compilation involves taking two unclassified information and merging together .