Opinion. This says that flossing is the BEST way to prevent cavities when other options may work better, saying it is the BEST way is an opinion.
The prepositional phrase of "James told me a story I had never heard until today," is "until today." The preposition is "until."
"<span>The North Central Plains—often called the Middle West or Midwest—are the heartland of America. The region lies between the </span>Ohio River<span> and the </span>Great Lakes<span> and stretches to beyond the 95th meridian. Included are eight states: </span>Ohio<span>, </span>Indiana<span>, </span>Illinois<span>, </span>Michigan<span>, </span>Wisconsin<span>, </span>Minnesota<span>, </span>Iowa<span>, and </span>Missouri<span>. The eastern portions of North Dakota, South Dakota, Nebraska, and Kansas are excluded".</span>
I think it's this one:
<span>"By nightfall he was fatigued, footsore, famished. The thought of his wife and children urged him on."
"urged him on" suggests that he's going somewhere, and that he needs motivation to go there. It seems that he's on the edge of survival: he's fatigued, famished, and where he's going is where his salvation likely is. </span>
Explanation:
I'm also looking for the question plz help