Which statement best describes how the author's structure this excerpt from warm river

(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.”)

According to the study, a is when you string one quote after another in an essay without connecting them

In which sentence does the underlined adverb modify a verb? (i’ll put the words that are underlined in caps) a. water young plants often. b. water young plants rather often. c. we generally water young plants often. d. water very young plants often.