Meaning: 'Instinct' refers to an innate, typically fixed pattern of behavior in animals in response to certain stimuli, here implying a natural human desire.

Wrong options:

• inheritance: Inheritance refers to the acquisition of property or traits from predecessors, which does not relate to the natural desire for wisdom and science.
• behalf: Behalf is a noun that means support or representation, which does not fit the context of describing a natural inclination.
• riches: Riches are material wealth, which is not relevant to the innate desire for wisdom and science.
• splendor: Splendor refers to magnificent and splendid appearance, which does not describe a natural impulse or desire.
• needs: Needs refer to basic requirements for survival or well-being, which does not capture the essence of a natural desire for wisdom.

Correct answer: riches

Explanation: The term 'riches' fits as a plural noun that refers to wealth or valuable possessions, contrasting with the treasure of wisdom and science. It maintains grammatical consistency and aligns with the context of comparing material wealth to intellectual wealth.

Meaning: 'Riches' means valuable possessions or wealth, particularly in terms of money or material goods.

Wrong options:

• inheritance: Inheritance refers to assets received from predecessors, which does not fit the context of comparing wealth types.
• behalf: Behalf does not relate to wealth; it refers to support or representation, making it irrelevant here.
• instinct: Instinct is a natural impulse, which does not pertain to material wealth and does not fit the context.
• splendor: Splendor describes grandeur or magnificence, which does not relate to the concept of wealth or riches.
• needs: Needs refer to essential requirements, which do not align with the idea of wealth or riches.

Correct answer: splendor

Explanation: The word 'splendor' is a noun that describes magnificent brightness or grandeur, fitting perfectly in the context of comparing the brilliance of wisdom and science to celestial bodies. It maintains grammatical coherence and enhances the imagery of the text.

Meaning: 'Splendor' refers to magnificent and splendid appearance, emphasizing the greatness of wisdom and science.

Wrong options:

• inheritance: Inheritance does not relate to the concept of brightness or grandeur, making it irrelevant in this context.
• behalf: Behalf refers to support or representation, which does not fit the context of describing the brilliance of wisdom.
• riches: Riches pertain to material wealth, which does not convey the idea of brightness or magnificence.
• instinct: Instinct refers to a natural impulse, which does not relate to the grandeur or brightness of wisdom and science.
• needs: Needs refer to basic requirements, which do not connect to the concept of splendor or magnificence.