Final answer:
A word with the suffix -tion would fit best in blank (4) of the sentence, which could be filled with 'sensation' or 'combination' to describe the result of the flavor.
Step-by-step explanation:
The sentence is missing several words and is looking for a place to insert a word with the suffix -tion. The word with the suffix -tion would fit best in blank (4), because -tion is a common suffix used to turn verbs into nouns, often to express the action or result of the verb. In this case, it would turn an adjective describing the flavor into a noun, which could be "sensation" or "combination", depending on the context of the sentence. Thus, the complete sentence might be: 'The unusual combination of spices gives the soup an exceptional flavor.'