Explanation:

- Variety: This refers to a range or assortment of different things. It implies differences and multiple types.

- Fusion: This implies merging or combining different elements into a single entity. It does not stand opposite to "variety."

- Medley: Similar to fusion, this represents a mixture or combination and does not oppose "variety."

- Similarity: This stands for likeness, sameness, or resemblance among things. It contrasts with “variety,” as it implies things being similar rather than diverse.

- Diversity: Like variety, this also indicates a range of different things or a mix. It is almost synonymous with "variety."

The correct antonym of "Variety" is Similarity.

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