I’m doing a blog assignment and I’m having trouble understanding what to write for the evidence and the resource. I have no clue what I’m supposed to write. It would be really helpful if someone told me what is supposed to go there and I’ll fill in with the topic I chose. Please help Asap

Which tone best fits a business letter

The correct word to complete the sentence

(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.”)