Formulate questions about the information mentioned in a given passage.

Q: context: A person is trying to stack plates, lamps, boxes, and coins.

A: What are the things that the person is trying to stack?
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Q: context: A brick, a microwave, an egg, and an apple moving at identical speeds each collide with a static hockey puck.

A: What are the things that are moving at identical speeds?
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Q: 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 book, the third is dropped from the height equivalent of a car, and the fourth is dropped from the height equivalent of a mountain.

A:
What are the things that are dropped?
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