V. Fill in the blank a preposition 1. Please wait me a few minutes.
2. You can use dictionary to look new words.
3. They are very proud their new house.
4. My sister is not very good math.
5. Tim is exciteda new school day.
someone help me solve it please.

(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.”)

How do the authors differ in the way they present the war in "facing it" and "ambush"?

Changing the sentence structure and how quickly events unfold in a story can affect which literally element?