Question

which type of sentence is this? during last nights thunderstorm, a flurry of tiny hailstones danced across the roof of our house. simple compound complex compound - complex

Explanation:

A simple sentence contains one independent clause (a complete thought with a subject and predicate) and no dependent clauses. The given sentence has one independent clause: the subject is "a flurry of tiny hailstones" and the predicate is "danced across the roof of our house"; the phrase "During last night's thunderstorm" is a prepositional phrase, not a dependent clause.

Answer:

simple