Drawing a distinction between barriers to communication and misconceptions about communication

What is the authors purpose in writing this paragraph

Read the excerpt from the common sense of bicycling: bicycling for ladies. the bicycle is capable of such high speed that there is a strong temptation to ride so fast as to cause over exertion or excessive perspiration. on the other hand some people ride too slow, causing a zigzag and uncertain movement. while exercising reasonable caution, be a fearless rider. when you come to a steep hill, if the road is clear, let it go as fast as it will. if you rid yourself of that ghost of fear, coasting is one of the greatest delights of cycling. which is the best paraphrase of the text?

•your english teacher has asked you to write a short three-page research paper. which topic is the most narrow? a. water pollution b. how lake pollution affects fish c. how water pollution affects seal d. pollution