People began to live longer due to medical breakthroughs, is the right answer.
The Industrial Revolution was a period during which many technological innovations took place. It was the time when not only male but women and children also involved in work. Moreover, during this time, people began moving from rural areas to the urban ones in search of better job opportunities. But there was no better in such new jobs they had to work for long hours and in very harsh conditions. Due to this, a number of Western nations experienced political revolutions.
