Select all of the common nouns. Ravens are a familiar sight from the Arctic Ocean to the Mediterranean Sea.

(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.”)

The bus driver who, only works weekdays, always waits for me when i'm running latecorrect the comma sandwich

He picture shows a fishing technique called trawling. how might trawling affect marine biodiversity? decrease biodiversity by harvesting everything in its path, so that unwanted fish are unnecessarily killed