Calvin is reading a play script. He notices part of the play where tha main character speaks at length to characters who remain silent on the stage. What is this kind o dramitic speech called

Answer: monologue

In a play, a monologue is a type of speech in which only one character speaks and the other characters remain silent. A monologue may be used to express the mental thoughts of the character or directly address other characters or the audience.

Based on this, since Calvin notices that only one character speaks while others remain silent, therefore, this dramatic speech is considered a monologue.

Pretty sure its a monologue.