What is an antonym for the word frivolous

(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.”)

Can you correct this paragraph? a football player once had a dream. the dream was about the queen of england. she was on a boat and was fishing. when she tried to put a worm on the fishing hook, her necklace fell into the water. a train conductor named maxwell threw popcorn in the water. the fish ate the popcorn then gave the queen her necklace. the queen said, ” you all for me get my necklace back! ” “you are welcome said the conductor and all the fish.

Why did martin luther king jr mention the ancient greek philosophersocrates in his letter