1.Will a healthy lifestyle that includes exercise and a proper diet slow the aging process? 2.The answer is far from certain. 3. However, regular exercise and healthy nutrition can certainly help us age better. 4. Exercise and a healthy diet improve cardiovascular and skeletomuscular fitness and reduce your risk of major killers such as cancer and other diseases. 5. A healthy lifestyle also improves your quality of life. 6. It provides you with a heightened sense of well-being and increased energy and vigor. Which sentence is the topic sentence?

Read this excerpt from i never had it made. "it's all that ought to count," he replied. "but it isn't. maybe one of these days it will be all that counts. that is one of the reasons i've got you here, robinson. if you're a good enough man, we can make this a start in the right direction. but let me tell you, it's going to take an awful lot of courage." he was back to the crossroads question that made me start to get angry minutes earlier. he asked it slowly and with great care. "have you got the guts to play the game no matter what happens? " "i think i can play the game, mr. rickey," i said. the next few minutes were tough. branch rickey had to make absolutely sure that i knew what i would face. beanballs would be thrown at me. i would be called the kind of names which would hurt and infuriate any man. i would be physically attacked. could i take all of this and control my temper, remain steadfastly loyal to our ultimate aim? which is the central idea of this excerpt?