I would suggest writing about the different kinds of applause an athlete receives from the crowd under various situations. There is a completely different quality to the enthusiasm and length of applause given to a come-from-behind winner than that given to a returning champion who wins easily. The reception given to an athlete who overcomes adversity to complete the race in spite of falling is much warmer than the applause given to an athlete whose victory dance gets over-exaggerated. You could go in a slightly different direction and discuss the applause given athletes at a golf or tennis meet as contrasted with the applause given to athletes at a baseball game.
"An interesting suggestion" is wide open, which makes it interesting as a possibility. Write about a suggestion you would like to make and explain why you feel it is a good idea. What do you feel would improve the lunches in your school's cafeteria and how would you suggest implementing those changes? Where do you think your family should go for its next vacation and what would be the reasons for choosing that destination?