Final answer:
The author uses tone to advance her purpose by speaking optimistically and showing extreme disappointment.
Step-by-step explanation:
The author uses tone to advance her purpose in two ways. First, she speaks with great optimism, appealing to her audience members' better nature. This can be seen in her positive language choices and hopeful attitude. For example, she may use words like 'hope,' 'progress,' or 'potential' to create an optimistic tone.
Second, she shows extreme disappointment, making her attack on lawmakers personal and less threatening. This can be seen in her use of harsh language and strong emotions. For instance, she might express frustration, anger, or sadness to convey a disappointed tone.