Answer: The correct answer is "Signpost".
Step-by-step explanation:
The use of signposts in public speaking refers to the technique used by speakers to capture the audience's attention by signaling them where the speech is going.
They are verbal statements used by the speaker that allows the audience to acknowledge where the speech is going and also helps to capture the audience's attention.
In this case, while Heather articulates the reasons for her position, she says "first," "Second", and "A final reason". These verbal statements are examples of Signpost.