Tourism is the industry in the world. a. fourth-largest b. second-largest c. largest d. third-largest

Tourism is the largest industry in the world. You have to estimate the position of the tourism on the global market and give your conclusion. At first, you have to make research and read about how this industry is popular and important for people and business and you will find out that this is an activity in which people take part widely, from all over the world, and its importance has incredibly increased over the human history. This is the main part of economical relationships.