Final answer:
An effective argumentative essay must contain a claim that is supported by evidence.
Step-by-step explanation:
An effective argumentative essay must contain a claim that is supported by evidence. Claims are statements made by the author to express their position on a specific topic. Evidence, such as facts, statistics, and expert opinions, is used to support the claim and convince the reader of its validity. By utilizing relevant evidence, the writer can strengthen their argument and make it more convincing.
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