In the early 1800s, British engineer Richard Trevithick invented the first railway steam locomotive. By 1850, Britain had more than 6,000 miles of railroad track. These two events are an example of which type of relationship?

The relationship is an example of the Industrial Revolution and how it both gave rise to many new innovations in industry but quickly pressed these innovations into service to fuel the rapidly expanding economy for example some of the railway lines and locomotives would be used to transport coal to market.