Why Flowers Wear Bright Colors
A flower is not just a pretty decoration. It is the part of a plant that makes seeds. To make seeds, most flowers need pollen, a fine powder, to travel from one flower to another of the same kind. This move is called pollination.
A plant cannot walk to its neighbor, so many flowers hire helpers. Bees, butterflies, moths, and other insects visit flowers to drink a sweet liquid called nectar. As an insect crawls inside a flower, pollen sticks to its body. When it flies to the next flower, some of that pollen rubs off. The flower has paid the insect in nectar, and the insect has carried the pollen.
That is why flowers wear bright colors and often smell sweet. The colors and scents are signals that say, "Food is here." Some petals even have lines or spots that point toward the nectar, like a landing strip.
Not all flowers use insects. Grasses and many trees depend on the wind. Their flowers are small, plain, and have no sweet smell, because they do not need to attract anyone. They make huge amounts of light pollen that drifts through the air.
Once pollen reaches the right place, the flower can begin to form seeds and often a fruit around them.