I believe the answer would be no rhyme scheme. Free verse poems are poems that are pretty much self explanatory. It is in the name, free verse, meaning that these poems do not follow any set of particular poetry rules/guidelines, nor do they have any rhythm/rhyme scheme.
Therefore, the answer is the last answer option. Hope this helps!
I believe the answer is, Because all people experienced periods of gloomy weather before. From what I've learned i believe that's the answer. Hope I helped!