Question

what is pollination ? why do seeds need to be dispersed ?

Answer 1

pollination is the transfer of pollen to a stigma, ovule, flower, or plant to allow fertilization.
Because plants cannot walk around and take theirseeds to other places, they have developed other methods to disperse(move) their seeds.

Answer 2

the transfer of pollen grains from the male reproductive part to female reproductive part called stamen and carpel respectively.
seeds are not dispersed becoz they are covered with a hard layer