a)insect pollinated flowers
.Flowers are scented and produces nectar.this are attraction of the insect which comes to obtain nectar .
. Flowers are large conspicuous with brightly coloured petals to attract insects
.Anthers are small and firmly attached to a firm filament ,this ensures that insect rub against the anthers as they crawl into flowers hence collecting pollen grains on their bodies.
.Stigmas are small sticky and occur inside the flower so that pollen grains can stick on insects bodies