Can someone pls help and thanks

Dogs make wonderful pets because they keep us happy and healthy, the topic sentence is "dogs make wonderful pets". can someone me write a unrelated sentences to the topic and can be eliminated. need asap

Why does the author of exploring the titanic give background information about his youth and education? to show his lifelong love for the ocean

Lens quotation: "character is what you are in the dark." -dwight lyman moody