Question

The _______ is used to mark interruptions in thought and brief summaries of content.

Answer 1

I Think Comma. I'm Not For Sure Though

Answer 2

dash

Step-by-step explanation:

Summary of content, which can also be called overview of content. A dash can be used to mark interruptions in thought and brief summaries of content to the sentence that are closely related to the content but not grammatically part of that content. Example of such can be a restatement or an illustration etc.