Question

read the excerpt from hamlet, act i, scene i. marcellus: what! has this thing appeard again to - night? bernardo: i have seen nothing. marcellus: horatio says tis but our fantasy, and will not let belief take hold of him touching this dreaded sight twice seen of us: therefore i have entreated him along with us to watch the minutes of this night; what is the effect of this dialogue? it creates an air of suspense in the plot. it shows how angry the characters are. it describes details of the castle setting. it entertains through the use of clever wording.

Explanation:

The dialogue mentions an unknown 'thing' that may have appeared again, and characters are waiting to see if it will show up. This uncertainty creates suspense in the plot. There are no indications of anger, no details about the castle setting are given, and no clever - worded entertainment is present.

Answer:

It creates an air of suspense in the plot.