How does the author add tension in this excerpt?

with the protagonist’s conflict
with an unexplained idea
with a sense of urgency
with fast pacing

With a sense of urgency

Explanation:

Urgency can cause an anxious feeling that induces a tense feeling throughout your body as you read the piece.

I  hope this helps you! Have a terrific weekend,

a low four-wheeled open carriage of a kind formerly used in russia.

b. our party quickly made its way into the cave / but we failed to find our host [the cyclops] himself inside.