Attributive. When you’re describing someone, you call their characteristics attributes so the same applies here when you’re using adjectives to describe the quality of a noun.
It would be much easier to help you if you mentioned what's the name of the story. Anyway, I think I've got what you mean. I hope you will find it helpful.
Here are the answers:
1. C.) Blackie<span> was the original leader of the gang.
2. The </span>C.) staircase<span> stuck up like a jagged tooth.
3. The gang’s plans for the day were decided by </span>B.) a vote.
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Sorry if something is wrong. In my view all of them are correct.
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Because they could get hurt and something really bad could happen also !