The true statement about the Arenal volcano in Costa Rica is:
Visitors to the volcano area can participate in hiking, zip-lining, massages, and baths.
Arenal volcano is a popular tourist destination, and various activities are available in the surrounding area, including hiking, adventure sports, and wellness activities like hot springs spas.
The other options are not accurate:
- The area is not closed to tourists despite the volcano's past activity.
- While Arenal was active until 2010, it has since been quiet, but it did not become dormant in 1984 specifically.
- Trips to Arenal can vary in cost, but they are not generally considered "extremely expensive." There are budget options available.