Read the passage. (1) exercise provides many benefits. (2) it strengthens muscles. (3) it helps prevent unhealthful weight gain. (4) it may reduce the risk of some cancers. (5) these are not the only benefits of exercise, however. (6) a recent study concludes that exercise provides mental health benefits too. (7) during exercise, the body produces endorphins. (8) these natural compounds help people relax and may lift people’s spirits. which is the most effective way to vary the length of the sentences in the passage? combine sentences 2, 3, and 4 to create a series. divide sentence 6 into two shorter sentences. insert more detail into sentence 7 to lengthen it. rewrite sentence 8 to make it into a subordinate clause.