Answer:
Lack of food i.e nectar is the main reason behind reduction of population of the pollinator
Step-by-step explanation:
Pollinators helps the flowering plants in pollinating and transport. Species such as butterflies, flies and moths are considered as pollinator which transport pollen grains from one place to other and also feed on the nectar of the flowers. Nectar is the major food source of these pollinator. Their population is reducing because of critically low nectar supplies