Keywords are the significant words or phrases that define the topic of an essay question. A synonym on the other hand is a word or phrase that means exactly or nearly the same as another word or phrase
The statement that a synonym for a word may be included as a keyword is true, because using synonyms will get you a more complete set of search results.
Answer:
Responses may vary but should include some or all of the following information: Primary-sector jobs are focused on obtaining natural resources or raw materials. Farming, fishing, mining, and logging are primary-sector jobs. Primary-sector jobs turn raw materials or resources into usable finished products. Processing, manufacturing, and construction are secondary-sector jobs. The primary and secondary sectors provide the basics that people need. When there is little technology, it takes a lot of workers to provide these basics. However, as technology improves (e.g. bigger and faster farm equipment and robots in factories), machines do more of the work. It takes fewer and fewer people to produce what is needed from the primary and secondary sectors. The extra workers are now available to take jobs in the tertiary sector, providing more and different services for others.
Explanation:
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The Burning of Fossil Fuels. Sulfur dioxide emitted from the combustion of fossil fuels like coal, petroleum for energy in power plants, and other factory combustibles is one the major cause of air pollution.