Answer:
They have bright colors, their stigma/pollen is on the outside and their petals are widely spread.
Explanation:
Bright colors: They are more attractive to insects for pollination.
Pollen on outside: It allows passing insects to have pollen stuck to their legs without difficulty and the pollen is easier for the wind to pick up.
Widely spread petals: again these allow the maximum number of insects to come and stay, are light and hence also an asset to wind-pollination.
