Because flowers mean food (pollen and nectar). Not just bees are interested!
The bright colours attract many birds and insects and also the stigma that's were the pollen is stored.
The bright colours of the orchid attract insects and are adapted to look like other brightly coloured insects.
Bright colours like red attract insects.
Many flowers, like the hibiscus have evolved to attract insects by traits such as bright colors and attractive smells.
It sticks to them.
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I'd say dark colours like black,brown and grey.
brown and green
Many insects that can fly will move from flower to flower to sample the nectar. Bees of all types are probably the commonest insects to do so.
they carry pollen from flower to flower.
Attracting pollinators (insects etc) to the flower.
yes