Answer:
The answer would be "evidence to support a claim".
Step-by-step explanation:
The evidence is an important tool when writing an argumentative essay because this serves as proof of your hypothesis. The evidence is important and considered "a strong outline" because the evidence is facts or examples that support your thesis or hypothesis.
To write an argumentative essay, the most recommended way to do it is by researching a topic, develop a claim or hypothesis and then, look for evidence that supports it.