What is the main difference between primary and secondary sources?

Which sentence will fatima’s teacher most likely ask her to revise?

"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.

Which most closely describes the author's use of historical information for the novel white fang? consider both texts provided. the author included details and descriptions of the dogs that match the historical details provided. b) the author changed the historical facts about early sled dogs to fit the needs of his plot and setting. c) the author changed the description and age of the dogs, which was necessary for his main character to develop bonds with the dogs. d) the author included historically accurate details of the dogs' working conditions, but the dogs he describes in his story are alaskan huskies.