Answer:
"The fire in the Mission District was subdued with water found blocks away in a hydrant."
Step-by-step explanation:
Any sentence that have a problem-solution structure will be a technique in which both the problem/ issue of the situation and the solution for that very same issue will be given in the same line/ sentence. In such type of sentences, there are two sides of the issue juxtaposed with each other. One side will have an issue that may pose a threat or be a problem while the other will have the remedy for the problem.
In such cases, the availability of the solution is a must to give it a full 'problem-solution' sentence. Thus, from the given sentences, the correct sentence that have this type of structure is the second option. In this sentence, the sentence not only talks of the problem of the "fire", but also the solution for this fire which is found in the "water... found blocks away in a hydrant".