Name the flower in which the pollination is carried out by bees. Explain the mechanism of collection of pollen grains in it.

Explanation

### Step-by-Step Solution:

1. **Identify the Flower**: The flower in which pollination is carried out by bees is the **Salvia flower**.

2. **Attraction of Bees**: Bees are attracted to the Salvia flower primarily due to the presence of **nectar**. The sweet nectar serves as a food source for the bees, encouraging them to visit the flower.

3. **Entry into the Flower**: When a bee enters the Salvia flower to collect nectar, it pushes against the flower's structure. This action is crucial as it initiates the pollination mechanism.

...