Answer:
Shakespeare creates tension in this scene by making the readers think that Romeo's life is at risk.
Step-by-step explanation:
In this scene we can see how tension is generated as Romeo wants to visit his beloved and talk to her despite the fact that this puts his life at risk. Because if someone from her family sees it, they could kill him. Remember that both families hated each other to death.
This generates that we as readers also worry, since we do not know what will happen if someone sees him. Even more tension is created by putting Juliet in such an innocent role, and without being cautious. This causes the reader to feel more worried.