Correct Answer: Serpentarium

Solution : The correct choice is the fourth option.

Serpentarium is the most appropriate word, as it specifically denotes a facility dedicated to housing and studying snakes. It refers to a place where snakes are kept, observed, and sometimes displayed for educational or research purposes.

The meanings of the other options are as follows:

• Apiary: A place where bees are kept, typically for honey production.
• Hive: A structure where bees live and store honey.
• Aviary: A large enclosure for keeping birds.