Explanation:

- In the passage, India is advised to listen to its sages about the importance of balance.

- The passage emphasizes not taking anything too far or being too extreme.

- The context implies there are consequences for not maintaining balance, like environmental degradation.

- Option 1: "but" - Typically contrasts ideas, which doesn't fit the need for presenting alternatives in this context.

- Option 2: "otherwise" - Implies consequences if something doesn't happen, not fitting here.

- Option 3: "so" - Implies cause and effect, not appropriate for the intended caution here.

- Option 4: "or" - Best fits as it suggests alternatives in maintaining a balance without being radical.

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