My Professor just told me my mark and it was really good...how am I supposed to respond? What should I say?

What is one way that the author makes a distinction between the first transcontinental railroad and the first transcontinental passenger flights in 1936

(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.”)

Read this sentence. the table was given to lexi by her grandmother. which of the following revises this sentence to include another prepositional phrase? the table in the kitchen was given to lexi by her grandmother. the table was given to lexi by her beloved grandmother. the table was given to lexi by her grandmother ruth. the wooden table was given to lexi by her grandmother. submit skip save and close