Final answer:
An effective argumentative essay must have a claim supported by evidence.
Step-by-step explanation:
An effective argumentative essay must contain a claim that is supported by evidence. The claim is a statement that asserts a particular position or viewpoint on a topic. This claim should be backed up with facts, statistics, examples, or other forms of evidence. The evidence helps to convince the reader of the validity of the claim and strengthens the overall argument.
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