Does this sentence use a colon or semicolon correctly? follow my advise: be yourself

"dogs make wonderful pets because they us stay happy and healthy"the topic sentence is "dogs make wonderful pets" i need writing a sentence that is unrelated to the topic and can be eliminated.

I’ve given a lot of thought to what one of them should be, and the answer seems clear.

Which statement best explains the relationship between the gothic genre and the characterization in the passage? o the characterization of mr. hyde contrasts with the gloomy setting that is typical of gothic fiction. o the characterization of mr. hyde reflects the preoccupation with confined spaces in gothic fiction the characterization of mr. hyde create the cheerful mood that is typical of gothic fiction. the characterization of mr. hyde reflects the focus on horror and strong emotions in gothic fiction.