N​ame the agents needed for pollination and describe how do they help in it.

The agents of pollination include wind, birds and insects. Pollination by wind means that pollen grains are being blown until pollen grains reach the stigma of another flower to mark the start of fertilization. Pollination by birds means that birds like the hummingbird go from flower to flower and pollen grains get stuck to the beak as the bird is drinking the nectar. When the bird goes to another flower, it pollinates the flower and allows fertilization. Pollination by insects is the exact same thing with birds and the most active agent is the bee.
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