Read the passage. (1) exercise provides many benefits. (2) it strengthens muscles. (3) it 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 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. rewrite sentence 8 to make it into a subordinate clause. divide sentence 6 into two shorter sentences. insert more detail into sentence 7 to lengthen it.