Correct Answer: Allimony

Solution : The correct choice is the first option .

The incorrectly spelt word is "allimony". The correct spelling is alimony, which is financial support paid by one spouse to another after a divorce or separation, typically to assist with living expenses.

The other options are spelt correctly, and their meanings are as follows:

• Structural: Structural refers to something related to the structure or arrangement of an object or system.

• Hallucinate: To hallucinate means to experience false or distorted perceptions.

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• Halloween: Halloween is a holiday celebrated on. the night of October 31st, the eve of All Saints' Day, often celebrated by children dressed up in frightening masks and costumes.

Hence, the correct answer is allimony .