Question

both wind and water pollination flowers are not very colourful and do not produce nectar.what would be the reason for this ?

Answer 1

many flowers in our world that attracts the butterflies ,ect. that flowers pollinated by insects it is not necessary that wind and water pollinated flowers also become colour and produce nectar

Answer 2

the main reason are as follows:
In wind- The bowling wind carries pollen grains from one flower to other flower and help pollination.

in water- the pollination in aquatic plants (partically those plants which by which are submerged in water) is done by water.