Final answer:
The word 'symptoms' in the given sentence is a noun.
Step-by-step explanation:
The word 'symptoms' in the given sentence is a noun. Nouns are words that name people, places, things, or ideas. In this case, 'symptoms' is a thing, specifically referring to the physical signs or indications of an illness or condition. The sentence is describing the speaker's experience of having a fever and weakness, which are the symptoms they are talking about. Therefore, the correct answer is d. noun.
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