Which statement is an analogy? American political parties are like two sides of the same coin. A two-party political system makes forming a third party difficult. Democrats and Republicans often see each other as enemies. Most Americans support either the Republican or Democratic party.

When we say analogy, this refers to referring two things for a given purpose to clarify or to explain. In the statements above, the one that shows analogy is the first statement. If you try to understand this statement, it clearly shows that there are two things being compared here and these are the American political parties and the two sides of the same coin.