Answer is: a) Sentence 9 restates the topic sentence.
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When people think about hobbies, they seldom think of cooking. 2But cooking is a great hobby. 3Like other hobbies, it provides a way to relax. 4There is nothing better than turning on some great music and getting out the cutting boards and mixing bowls. 5As with other hobbies, cooking leads to related hobbies. 6Many hobby-cooks enjoy collecting fine cookware, cookbooks, or any number of super potato peelers, graters, and other gadgets. 7Unlike other hobbies, cooking brings rewards for more people than the cook. 8When the cook turns out a sizzling steak with golden grilled onions, a steaming baked potato, and a fresh salad, everyone is pleased. 9The sense of fulfillment and enjoyment that attends cooking makes it a hobby more people should consider.
Sentences 3 through 8 are a) transitional sentences. b) concluding sentences. c) supporting details. d) introductory sentences.