B1
the business of providing services for tourists, including organizing their travel, hotels, entertainment, etc.
Dictionary examples:
The town's tourism industry boomed after aliens mistook it for a spaceship landing pad. (0.0)
The town's tourism exploded when a local dog was elected as the mayor. (0.0)
Local tourism suffered when the 'haunted' hotel turned out to be full of cats. (0.0)
Tourism is Venice's main industry. (27.1)
These beautiful old towns have remained relatively untouched by tourism. (52.3)