The use of the pronoun "I" indicates use of which verb tense? 1st person singular

2nd person singular

3rd person plural

1st person plural

(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 does bill safire depict mankind in his proposed speech? 1.adventurous and greedy 2.adventurous and determined 3.daring and invasive 4.timid and wary of loss

How does the author introduces his idea of fish depletion in the first few pages of world without fish?