Abstract nouns are essentially nouns that can be interpreted differently by different individuals, such as beauty or maturity. Going by this definition, the abstract noun in the given sentence should be "loyalty".
Answer:
The power in nature that one perceives is due both to nature and to one’s own intelligence.
Explanation:
In the last paragraph but one, the author says, "The greatest delight which the fields and woods minister, is the suggestion of an occult relation between man and the vegetable." And the final paragraph starts with this statement, "Yet it is certain that the power to produce this delight, does not reside in nature, but in man, or <u>in a harmony of both</u>."
d.character versus society
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