How did the industrial revolution start? I really need well-developed explanation.

The development of agriculture was hallmark for the development of human civilization. Before that, humans had to focus their efforts on hunting and harvesting for food, so the effort existed to sustain life. After the development of agriculture, civilizations came to have a food security, that is, subsistence is no longer a doubt. From then on, society can turn its attention to other activities and has experienced a major evolution. One of the activities by which people could develop was work, which eventually led to the development of technologies. The industrial revolution is the result of the human capacity to work and create technological tools. This was only possible after the population had a food security, thanks to the agriculture revolution.

The commercial revolution allowed for two key components. First they allowed joint stock companies to put money into a company. If the company failed not all your money was lost. Second the commercial revolution allowed for major raw resources to be brought to Europe, which in turn was finished products.

i'm pretty sure it would be, the mediterranean sea.