To melt is to become liquid.
To become solid is to solidify.
A.
The poem highlights that life has both happiness and sorrows.
When you talk to or about someone in a mocking tone, you're making fun of them in a nasty, mean way. But if you're a comedy writer or political satirist, a mocking attitude is a tool of your trade.
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We can observe that all the answers contain ellipsis which is an intentional omission of a word, sentence or something longer. The correctly applied version of ellipsis is the first option - Our democratic-republican government is based on the idea of the natural right of every individual member thereof to . . . a vote in making and executing the laws. Omitted word is "voice". Other options are not correct because all of them contain mistakes regarding the usage of the ellipsis.