Answer:
C) Increase tension
Step-by-step explanation:
In this text, we see that one of the characters has found something. We do not know what this is, as it is only referred to as "one." However, we do know that this is considered good news, as the character says that it is not worth stopping for one (which implies they both want to stop to look at the object). The fact that a promise of seeing more than one exists contributes to increasing the tension in the story, as it motivates the reader to keep reading and find out more about it.