Answer:
material that current can pass through easily
Self-centered people? i don’t if it was a certain answer choice that you wanted us to give
Im 99% sure the answer is B. :)
Since you submitted a 'problem-and-solution' essay, this would fall under 'Editorial Section' where the opinions of writers are located. Your local newspaper would place your essay on the 'Editorial' section of the newspaper. I hope this helps.