Analogy — Habitats and Artificial Enclosures ‘‘Forest’’ relates to ‘‘Vivarium’’ (an artificial enclosure for keeping plants/animals) as a natural habitat relates to its controlled, built environment. By analogy, ‘‘Sea’’ relates to which constructed enclosure?

Introduction / Context:
This analogy compares a natural environment with its artificial, contained counterpart. A ‘‘vivarium’’ is a controlled enclosure for observing or keeping living organisms that would naturally live in environments such as forests or fields. We must find the corresponding artificial environment for the sea.

Given Data / Assumptions:

• Forest = a natural terrestrial habitat.
• Vivarium = man-made enclosure for organisms, often small-scale.
• Sea = a natural marine habitat.
• We seek the man-made enclosure equivalent for sea life.

Concept / Approach:
Match the pattern: natural habitat → artificial containment. Forest → Vivarium; therefore, Sea → ?. The well-known artificial container for marine life is an ‘‘Aquarium.’’

Step-by-Step Solution:
1) Identify relation: natural habitat vs constructed enclosure.2) Forest corresponds to vivarium; sea corresponds to aquarium.3) Check options for the best fit: ‘‘Aquarium’’ is the precise controlled water environment used to keep and observe aquatic organisms.

Verification / Alternative check:
Port site is an infrastructure for docking ships, not an enclosure for organisms. Fishery is an industry/location for catching or cultivating fish, not primarily an observation enclosure. Water is the substance, not the container.

Why Other Options Are Wrong:

• Port site: functional maritime facility, not an organism enclosure.
• Water: material, not a container.
• Fishery: economic activity/location, not a controlled glass tank for observation.

Common Pitfalls:
Confusing any sea-related term with an ‘‘enclosure.’’ The analogy demands a constructed containment with observational or husbandry purposes, which is exactly an aquarium.

Final Answer:
Aquarium