Use reasoning to lead to the answer of the following question:
What do you add to you dough when making bread to make it rise?
Options:
- yeast
- oven
- mess
- flour
- biscuit
 Reasoning process:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Yeast helps in incresing the size of dough. Yeast put in bread dough helps it rise. Therefore, the final answer is yeast.