What is special about pollination is Yucca ?

Explanation

1. In Yucca the cross-pollination carried out by special moth, Pronuba yuccasella.
2. Fully opened fl owers emit perfumes and are visited by the female moth, especially during nights.
3. This moth collects a lot of pollen grains from one flower and visits another flower.
4. Life history of this moth is intimately associated with the poll ination mechanism in Yucca.