Which of the following tips can you engage the audience as you speak?
a. budgeting time
b. using notecards
c. speaking quietly
d. eye contact

D) Eye contact.

Explanation: engaging the audience while we speak means to encourage the listeners to be involved and interested in what we are saying. From the given options, the tip that can help you engage the audience as you speak is to make eye contact, because when we make eye contact with different people in the audience, they feel that we are talking directly to them, and this can help them to be more engage.

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.