Which excerpt from "Creepy, Crawly Healers" uses a problem-and-solution structure?

"Scientists performed a study in 1989 and discovered that maggots were safe and
useful."

"Since scientists know that spider silk has
benefits, it is being developed in a lab."

"In the late twentieth century, maggots were used only when modern practices
failed to heal a wound."

"A company in Britain has created a leech farm. It supplies leeches to doctors all over the world.”

Read the excerpts from the land. [willie] turned to my daddy. "it's my boy mitchell done this, mister edward, and i know there ain't no way t' make it up t' ya if this here horse don't heal right, but i jus' 'bout t' put a strap t' mitchell my own self 'bout what he done. i'm gonna put a strap t' him right now, matter of fact! " with that said, he positioned his whip and turned toward mitchell. *** my daddy stopped and looked at me. "no," he said. "i'm not going to whip you, paul. no, your punishment is that you'll never get to ride ghost wind again. i figure you'll remember that a whole lot longer than a whipping. you won't ride any of the other horses either, including the appaloosa, until i say so." which statement about willie’s and mister edward’s reactions is true? both men believe that their sons should be held accountable for their behavior. both men believe that their sons need to learn to handle horses properly. both men believe that their sons will likely harm the horses if they ride them. both men believe that their sons have permanently injured ghost wind

This thinning would materially change the sound of the drum, evidence that although it might continue to be used for its original purpose of music-making or calling people to arms, it would now do so with a different voice. a musical instrument had become a trophy, and the new carvings were in fact branding, a statement of the north’s political dominance over central africa and of allegiance to islam.the drum had come to khartoum at a critical moment in sudanese history. in an audio version, stressing the word "branding" would do what for the listener? emphasize the word's importance and the idea that followsadd emphasis to the following sentencesignal that something important has just been repeatedadd emphasis to the preceding sentence

At viewpoint on men and woman does victors description of elizabeth reflect in the passage from the frankenstein