Mention name of ecosystem service which is involved in sexual reproduction of plants.

Explanation

**Step-by-Step Solution:**

1. **Understanding Ecosystem Services**: Ecosystem services are the benefits that humans derive from nature. They can be categorized into four main types: provisioning, regulating, cultural, and supporting services.

2. **Identifying the Relevant Service**: In the context of sexual reproduction in plants, we need to identify which ecosystem service plays a crucial role in this process.

3. **Recognizing Pollination**: The service that is directly involved in the sexual reproduction of plants is known as **pollination**. This process involves the transfer of pollen from the male part of the flower (anther) to the female part (stigma).

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