Which sentence is an example of a strong conclusion to an autobiography? a. i stayed after school three days in a row to practice onstage in the auditorium. b. i knew i would have to practice all week to memorize my dance for the recital. c. after the recital was over, i knew practicing was worth it, and i was looking forward to my next big challenge. d. on opening night, i danced in front of a packed auditorium.

C. After the recital was over, I knew practicing was worth it, and I was looking forward to my next big challenge.

Explanation:

The last and very important paragraph of an autobiography is conclusion. In this section the author tries to wind up the things by addling some part from general intro and some part consists of closing remarks.

The conclusion of the autobiography  can vary based on its idea or theme. However, conclusion is the best part where we can tie up the remaining loose ends.

If we look at option A, it doesnt look like a strong conclusion but a part of somewhere from middle of the story. It doesnt indicate anything that seems concluding the story.

If we look at option B and C, they also looks like the middle part of the story since it has no concluding remarks.

If we look at option C, it definitely looks like it tied up the loose ends. "I was looking forward to my next big challenge" indicates that one milestone was achieved or one story was completed but he was ready for next challenges.

Hope it help!

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."