What is the purpose of the witches scenes in macbeth?

Which is included in the radio broadcast to capture the listener's attention that the original text of the story is not able to include

Based on the cause-and-effect relationship in this sentence, what is the meaning of the word revert? the brownies kali made using a new recipe were too dry, so she reverted to her original recipe. a) to alter or change completely; revise b) to dispose of or remove; to throw away c) to prepare for something; assemble or make d) to go back to a previous state or practice

What is the main idea of this paragraph from the volcanoes section of the ready.gov website