How does the impression of mr. griffin changes

(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.”)

May someone me with these questions

What causes mrs. x to become vulnerable as she speaks to miss y? a. miss y’s responses make mrs. x self-conscious about her abilities as an actress. b. miss y’s nonverbal cues make mrs. x realize that miss y has a relationship with her husband. c. miss y’s lack of eye contact makes miss c feel that she isn’t a good friend. d. miss y’s disinterest in mrs. ax’s christmas gift causes her to feel weak.