Question

Is this a run-on sentence? Because penguins are frightened by humans and difficult to approach, researchers from the University of Strasbourg used remote-controlled rovers outfitted as baby penguins to study their subjects.

Answer 1

No, it is NOT a run-on sentence; instead, it is a perfectly standard complex sentence -- in this case, a dependent clause followed by an independent clause.

Answer 2

No, it is NOT a run-on sentence; instead, it is a perfectly standard complex sentence -- in this case, a dependent clause followed by an independent clause.

Step-by-step explanation: