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(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.”)

Explain the purpose of eliezer's fathers allusion to mrs schachter

Want free 20 points + brainliest? answer correctly and i got you search and rescue dogs read the following article: search and rescue dogs are carefully selected when they are quite young. trainers look for dogs that lack aggression and respond well to commands. they also look for a certain mental focus—it can be on a type of play or a special toy—that will enable the dog to work at a single task for a long time. this focus is important to the training of the dog, but also will be required when the dog is searching for and following human scent. if a dog is selected for sar training, it will be taught—through a series of games—how to make the most of its powerful nose. for example, dogs learning to follow scents on the air might play a tug-of-war game with the trainer involving a special toy. then with a restraining the dog, the trainer will run away with the toy, find a hiding spot, and then call the dog. the dog can follow the scent of both the trainer and the toy. in this way, the dog is practicing important skills even though it may seem like just a game. eventually, the toy is removed from this game, and the dog focuses on the human scent. later the dog will learn more difficult tasks: to pick up a scent from an article of clothing or pick out a particular human scent in a crowd of people, for example. step-by-step, focusing on play-based learning, the dog acquires the techniques needed to find victims. once the dog learns to find the human without the toy, the trainer will continue working with the dog, hiding the "victim" in more challenging spots, making the trail double back on itself, leaving a trail over a wide range of terrains, or adding another person as a distraction. when you see a sar dog working at a disaster, trying to locate victims, remember the dog's natural talents have been carefully shaped by an equally talented trainer and handler. the dog, while amazing and probably beautiful, is just one half of a very important partnership. which line from the text best represents the author's opinion or point of view? a. they also look for a certain mental focus. b. remember the dog's natural talents have been carefully shaped by an equally talented trainer and handler. c. step-by-step, focusing on play-based learning, the dog acquires the techniques needed to find victims. d. the dog acquires the techniques needed to find victims.