You will be given a definition of a task first, then some input of the task.
Formulate questions about the information mentioned in a given passage.

context: Four balls are dropped. The first is dropped from the height equivalent of a microwave, the second is dropped from the height equivalent of a mountain, the third is dropped from the height equivalent of a book, and the fourth is dropped from the height equivalent of a car.
Output:
What are the things that are dropped?