The following sentence is a run-on: The Merchant of Venice is an interesting play it is about a young man named Bassanio, who falls in love with wealthy girl, Portia.
It should be re-written the following way:
The Merchant of Venice is an interesting play. It is about a young man named Bassanio, who falls in love with wealthy girl, Portia.
The sentence is two sentences fused together as one, which makes it a run-on and also difficult to read. When the proper punctuation is used the sentence is no longer a run-on and is then easier to comprehend.
Pathos came from the Greek word which means suffering. So this means it is a rhetorical device that appeals to the emotion of the audience and elicit feelings that are already inside of them. It could be through the use of metaphor or with the way it is delivered.