Statements:\nI) Water has shape and has volume.\nII) Knowledge is like water; it flows from one side to another.\nConclusions:\nI) Knowledge is interdisciplinary (it flows across fields).\nII) Knowledge is bound within a specific area only.\nIII) Knowledge directly influences the core of mental activity.

Introduction / Context:
The item uses metaphor: “knowledge is like water,” emphasizing flow and spread. We must test which conclusions necessarily emerge from this metaphor without importing external facts.

Given Data / Assumptions:

• Water: has volume and shape (container-dependent), and can flow.
• Knowledge is likened to water and said to “flow from one side to another.”

Concept / Approach:
Metaphorically, “flow” of knowledge indicates transferability, diffusion, and cross-boundary movement—supporting interdisciplinarity. The statements do not claim that knowledge is restricted to a single domain, nor do they assert anything about “directly influencing core mental activity.”

Step-by-Step Solution:
1) Conclusion I (interdisciplinary): The flow analogy entails crossing boundaries; therefore I follows.2) Conclusion II (bounded): Contradicts the “flow” notion; II does not follow.3) Conclusion III (influences core mental activity): Not stated or entailed by the metaphor. The premises compare structural/locomotive properties (shape/volume/flow), not cognitive causality; III does not follow.

Verification / Alternative check:
Even if III is often true in real life, logical necessity must arise from given premises; it does not here.

Why Other Options Are Wrong:
Any option including II or III adds claims not supported by the metaphor.

Common Pitfalls:
Overextending metaphors into psychological assertions; treating a plausible real-world statement as logically entailed.

Final Answer:
Only Conclusion I follows.