Choose the ODD one out from the following terms given and name the CATEGORY to which the others belong :
Heterostyly, Autogamy, Geitonogamy, Xenogamy

Explanation

To solve the question, we need to analyze the terms given: Heterostyly, Autogamy, Geitonogamy, and Xenogamy.

### Step-by-Step Solution:

1. **Understand the Terms**:
- **Heterostyly**: This refers to a condition in flowering plants where there are different forms of styles (the female reproductive part) within the same species. It is a mechanism that promotes cross-pollination.
- **Autogamy**: This is a form of self-pollination where pollen from the same flower fertilizes its ovules.
- **Geitonogamy**: This is a type of pollination where pollen from one flower fertilizes the ovules of another flower on the same plant.
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