Why are my last two sentences wrong? Please tell me the correct answer.

(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.”)

Must read story will give if ! in “perseverance,” which theme is reflected in the lines, “life’s field will yield as we make it / a harvest of thorns or of flowers”? a: life is a field in which flowers and thorns will grow. b: accept what you are given, because you cannot change it. c: your life is the result of the work you put into it. d: working together people achieve their goals in life.

Read the excerpt from "the love song of j. alfred prufrock." let us go, through certain half-deserted streets, the muttering retreats of restless nights in one-night cheap hotels and sawdust restaurants with oyster-shells: how is this excerpt an example of dramatic monologue? the narrator is using long, interconnected sentences. the narrator is able to see into two character's heads. the narrator is addressing the audience directly. the narrator is jumping from one topic to the next topic