It's a run on sentence because there is no conjunction separating the two sentences. If there was an **and (**your conjunction) then it would be considered a compound sentence. Hopefully this helps.
It's a run-on sentence, because there's no transition.
The group of words "I hear thunder I feel rain" is a run-on sentence because it combines two independent clauses without proper punctuation or conjunctions. If a conjunction like 'and' were used, it would be classified as a compound sentence. Thus, the correct answer is A. run-on sentence.
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