Let’s talk about the birds and the bees, literally and metaphorically. In addition to bees, six other things contribute to spreading pollen among plants, each designed for a specific action.
For a flower to reproduce, the pollen must move from the male reproductive structure (anther) to the female reproductive structure (stigma). Since many plants need help with this process, they have developed ways to attract helpers. Most use color in the form of flowers, but others lure pollinators with scent or pollen weight.
4. Birds

Birds possess good color vision but a poor sense of smell. Therefore, the flowers that attract birds abound in color but offer little scent. They search for plants containing a lot of nectar to serve their high energy needs. Many fruits and berries turn red when ripe to attract birds who eat the fruit and then distribute the seeds for continuation of the species.