Final answer:
When finding evidence to support a thesis in a critical essay, it is important to use knowledge from scholars and critics, use proof from the text, have a narrow and focused topic, and prioritize analyzing and evaluating the text.
Step-by-step explanation:
When finding evidence to support a thesis in a critical essay, several factors must be considered. One important consideration is to use knowledge from scholars and critics as evidence. Another factor is to use proof offered from the text itself. It is important to have a narrow and focused topic for the essay. Lastly, the focus should be on analyzing and evaluating the text, rather than solely relying on the author's opinion.