Bees contribute to pollination in nature by transferring pollen from the male part of a flower to the female part. This process allows plants to reproduce and produce fruits and seeds. Bees are attracted to flowers by their colors and scents, and as they collect nectar for food, they inadvertently pick up pollen on their bodies. As they move from flower to flower, they transfer this pollen, facilitating the pollination process. This essential role played by bees is crucial for the reproduction of many plant species in nature.