In the flowers of wind-pollinated plants, as a rule, much more pollen is formed than in insect-pollinated ones. What is the reason for this?

1) The pollen of insect-pollinated plants is transferred from flower to flower by insects purposefully, it is large, there are not many of it.
2) Wind-pollinated plants form more pollen to increase the chance of it reaching small flowers.
3) Pollen is sometimes carried away by the wind, beaten by rain, and only a large amount of it contributes to fertilization.

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