Formulate questions about the information mentioned in a given passage.
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Question: 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 car, the third is dropped from the height equivalent of a book, and the fourth is dropped from the height equivalent of a table.

Answer: What are the things that are dropped?


Question: context: A brick, a microwave, an egg, and a leaf moving at identical speeds each collide with a static hockey puck.

Answer: What are the things that are moving at identical speeds?


Question: context: A person is trying to stack flowers, eggs, bottles, and blocks.

Answer:
What are the things that the person is trying to stack?