Which of the following was a cause of the increase in total u. s. urban population during the early 20th century? the failure of the populist movement. improved living conditions in cities. the success of the labor unions. job opportunities in industry.

Job opportunities in industry.

Explanation:

The urban population had been growing steadily since the end of the Civil War, getting the United States to be the country with the largest cities in the world.  Economic changes and technological progress developed an industry that required workers moving into the new cities. According to the 1920 United States´ census, by then the population in urban areas had surpassed those in rural areas.  

assuming that you are talking about the one in egypt: hecka oil

explanation:

herodotus taught this. herodotus was an ancient greek historian who was born in halicarnassus in the persian empire. he is known for having written the book the histories, a detailed record of his "inquiry" on the origins of the greco-persian wars.