Question

i-readysummarizing informational texts - instructiowould-be rescuers who dashed into the tunnel wereovercome by gas. for hours no one else dared to enter thesuffocating, poisonous deathtrap. then, late that night,someone had an idea. they would send for garrettmorgan and his new invention.garrett morgan was a successful factory owner incleveland, ohio. he had grown up on a farm in kentuckyas the son of freed slaves and the seventh of 11 children,but he left home at 14. morgan was good at figuring outhow gadgets work, and by age 30 he hadhis own sewing machine shop.openedclosedmoved

Explanation:

The context describes Garrett Morgan establishing his own business by age 30. The word "opened" fits logically here, as it refers to starting/launching his sewing machine shop, while "closed" and "moved" do not match the positive, forward-moving context of his career success.

Answer:

opened