Its the wind that carries the pollens. The flowers swells sticky substance that catches the pollen grains
"pollinators"
To attract pollinators
the nectar.
To attract the pollinators.
This is an example of "Natural selection". Those flowers that don't attract pollinators die out, because they rarely get pollinated except by accident. So the only flowers that are left are the ones that exist symbiotically with pollinators.
To attract pollinators visually.
Trees have bright flowers to attract the pollinators. specific types of pollinators are bees and hummingbirds.
To attract (specific) insects (pollinators).
To help attract pollinators.
to attract pollinators
To attract pollinators.
The purpose of bright colours in the flowers is to attract the insects that act as pollinators.