What do you need help with?
The best definition for poor in the passage is meager.
In this scene, the ghost of King Hamlet and the young Hamlet interact, with the ghost telling Hamlet how he was murdered by his own brother, who than took his crown and position. He than asks Hamlet to take the revenge on his uncle for murdering his father and marrying his mother. Poor is used as to mean that his request is simple, not a big deal.
It should not be controversial: it would only make the research less reliable since people would have their opinions about the topic that they would want to defend. It should also not be obscure: then it's hard to check.
The best answer is that it should be multifaceted: it should include a number of aspects, not just one, so that the test can check for those aspects, not just one.
Write an essay about a trip to the beach