Final answer:
The rhetorical appeal of the statement is Logos, as it appeals to reason and logic.
Step-by-step explanation:
The rhetorical appeal of the statement "Fair trade agreements have raised the quality of life for coffee producers, so fair trade agreements could be used to help other farmers as well" is Logos.
Logos refers to appealing to reason and logic in an argument. In this statement, the speaker is using the logical reasoning that if fair trade agreements have improved the quality of life for coffee producers, then it is reasonable to assume that similar agreements could also benefit other farmers.
This statement is based on the premise that fair trade agreements have been successful in improving the quality of life for coffee producers. To support this claim, you can refer to the article here which provides information on fair trade coffee and its impact on farmers.