The sentence to ask about an interesting fact about natural disasters is: "¿sabías algún hecho interesante sobre los desastres naturales?"
To elaborate the first requested sentence, the verb "saber" must be used in the imperfect tense. Likewise, for the other sentences, attention should be paid to the guidelines and the verb tenses to which it refers, therefore they would be:
As can be seen, the sentences written in Spanish meet each of the requested parameters, by which they can be identified as correct according to each given requirement.
If you want to learn more about Spanish, you can visit the following link: https://brainly.com/question/28065809
#SPJ1