Answer: The word that correctly completes the sentence is "abated".
Explanation: The word "abated" is a conjugated form of the verb "to abate". Moreover, it makes reference to something that has diminished in intensity. In other words, it is used to refer to something that has become less intense. In the case of this sentence, "abated" can be used with "flood waters" to mean that the flood waters have become less strong, which has allowed people to fix the damages. "Abated" is the only word among the options that could fill in the blank since, unlike the other words, it adds coherence to the sentence.
