What is a brightly colored, flower structure that to attract pollinators?

fruit

stigma

stamen

petal

Insect pollinators are attracted to the aroma emitted from the petals and the nectar glands located inside the flower. When an insect grazes through a flower to collect nectar, pollen grains accumulate on its body from the anther. As the creature maneuvers to each flower, it leaves a residue of pollen on the stigma and triggers the process of pollination. Examples of insect pollinators include honeybees, bumblebees, moths and butterflies.So the answer would be petals

The correct answer is "atomic weight".