What is the relationship between mutation, natural selection, and adaptation?

Relationship between mutation, natural selection, and adaptation:A change that occurs in the sequence of an organism's DNA is mutation. Natural selection decides which mutations will live and which will not live when mutations occurs. Adaptation makes an individual to suit the environment indirectly with the help of the natural selection.Mutations are the raw materials for the Evolution process and they occur due to radiation which is a high energy source or because of the chemicals that are present in an environment. It can also occur suddenly when DNA replicates. When mutations occurs the decision of which mutations must or must not live is taken by Natural selection. It routes the process of evolution to integrate only those mutations that are good  and remove those mutations that are bad into a species. Adaptation helps in making an individual suitable for the environment indirectly by Natural Selection process.

Homologous chromosomes with heterozygous alleles d) heterozygous chromosomes with homozygous alleles