The young politician . . . . . . . with his party and decided to contest the election as an independent candidate.

fell down
fell out
fell through
fell in

The correct answer is B. fell out.

The young politician fell out with his party because he disagreed with their policies. He decided to contest the election as an independent candidate because he wanted to represent the people’s interests, not the interests of the party.

A. fell down is incorrect because it suggests that the politician physically fell down.
C. fell through is incorrect because it suggests that the politician’s plans failed.
D. fell in is incorrect because it suggests that the politician joined the party.