A soliloquy is used in drama to develop a strong relationship between two characters.
insert humor and lightness into a dramatic scene.
persuade readers toward a specific political viewpoint.
allow the audience direct access to a character’s feelings.

allow the audience direct access to a character’s feelings.

Explanation:

A drama can be defined as a literary work that presents the dialogue between characters, as well as portrayal of fictional and non-fictional events in a theatre.

A soliloquy can be defined as a literary device used mostly in a drama and it typically involves the character speaks directly to him or herself and relates his or her emotions, feelings and innermost thoughts as if thinking aloud.

This ultimately implies that, a character speaks directly to him or herself in a soliloquy. Also, no other character is present when a particular character is soliloquizing on the stage or in a drama.

In conclusion, a soliloquy is used in drama to allow the audience direct access to a character’s feelings as he or she speaks directly to him or herself.

mark twain, real name samuel langhorne clemens, was an american writer, humorist, entrepreneur, publisher, and lecturer. among his novels are the adventures of tom sawyer and its sequel, the adventures of huckleberry finn, the latter often called "the great american novel". wikipedia