Textual evidence
Textual evidence is a specific phrase, sentence or detail from the passage that supports a claim about the passage.
A simple test
For any claim, ask: "Which line shows that?" If you cannot point at a line, you are guessing.
Example
Passage: "Mara hesitated at the door. Then, with a long breath, she stepped inside."
Claim: "Mara was nervous." โ Evidence: "hesitated at the door" and "with a long breath".
Claim: "Mara was angry." โ Evidence: there is no anger language; this is unsupported.