Why do you think the author chooses to identify the narrator simply as "the seventh man," rather than name him?

11. why is it important to use positive language in business messages?

(1) fire extended humans’ geographical boundaries by allowing them to travel into regions that were previously too cold to explore. (2) it also kept predators away, allowing early humans to sleep securely. (3) fire, in fact, has been a significant factor in human development and progress in many ways. (4) other obvious benefits of fire are its uses in cooking and in hunting. (5) probably even more important, however, is that learning to control fire allowed people to change the very rhythm of their lives. (6) before fire, the human daily cycle coincided with the rising and setting of the sun. (7) with fire, though, humans gained time to think and talk about the day’s events and to prepare strategies for coping with tomorrow. the sentence that expresses the main idea is: (type the number of the sentence. then click “go.”)

Type the correct answer in the box. spell all words correctly. certain species of insects introduced accidentally in a forest are destroying all the douglas fir trees in that forest. the wood of these trees is extensively used for construction. in order to control the damage caused by these insects, the forestry department decided to introduce the moth caterpillar in the forest. these caterpillars are natural predators of the insects. which method did the forestry department implement to control the invasive species? the forestry department implemented a(n) control method.