In the statement, "calvin sold his", which sentence componet is missing

Apolitical campaign showing the candidate wearing a hard hat and work shirt while touring a factory is using oa) glittering generalities. ob) transfer appeal. oc) testimonial. od) plain folks appeal.

Dentify the reasons that support the claim. check all that apply. claim: students should be required to take at least one online class. learning entirely remotely is one option that many schools offer. online classes provide more flexibility in students’ schedules. everyone enjoys using a computer, so online learning is more fun than traditional learning. one online class should be a mandated part of any school’s curriculum. students learn valuable skills they can apply in online college courses.

How does these final lines from kubla khan by samuel taylor coleridge affect the overall tone of the poem?