Contrasting colours within a flower also help make it more visible to insects and animals. Flowers are often most colourful when they are mature and ready for pollination. Colourful bilateral symmetry in a flower indicates that it is more advanced. Pollen analysis revealed that the body of a man had been placed on a bed of flowers. Why is not known but one suggestion is that the perfume given off by the flowers helped to cover the odor of the decomposing corpse.
Genes seek to reproduce themselves through having offspring.
This, of course, is not conscious but just the way it is. Animals further up the hierarchy of the social group generally have more access to resources such as food and mating opportunities in order to survive and reproduce their genes. Animals must compete in order to get resources and mates. Animals which did not compete for food would not get enough to eat and so would eventually die. Animals which did not compete for mates would not be able to pass on their genes.