3 Which of the following is true of section transitions in a speech?
They are statements that elaborate on a main point of the speech.
6
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They show the relationship between the minor parts of the speech.
They summarize what has just been said in one main point and preview the one coming up next.
9
They are usually one-word references that connect pieces of supporting material to the main point.

a lot

explanation:

the purpose of the heading in the passage is to identify who is telling the story.

this excerpt is part of the book sugar changed the world (2010) written by marc aronson and marina budhos. as the book has been written by two people, the heading "marc" indicates that this specific excerpt is being narrated by aronson. in the fragment, marc describes his grandfather's story after hearing it from his cousin. however, there are other excerpts where budhos is the one that tells the story of her family.

aronson and budhos, who are husband and wife in real life, decided to write sugar changed the world when they found out how sugar, which had an important role in slavery and economy, changed their ancestors' lives.

avengers: endgame.

explanation:

avengers: endgame.