What is the question "What causes rust ?" asking about?

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- description
- entity
- abbreviation
- human
- numeric
- location
A: description

What is the question "What happens when lightning strikes a body of water ?" asking about?

OPTIONS:
- description
- entity
- abbreviation
- human
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A: description

What is the question "What were the achievements of Richard Nixon ?" asking about?

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- description
- entity
- abbreviation
- human
- numeric
- location
A: entity

What is the question "What is the origin of U.S. Army sergeant 's stripes ?" asking about?

OPTIONS:
- description
- entity
- abbreviation
- human
- numeric
- location
A:
description