I want to know the answer to the following question:
What is one reason for homologs to appear?
All the background I'm provided with is that "These genes appear either from gene duplication within an organism's genome, where they are known as paralogous genes, or are the result of divergence of the genes after a speciation event, where they are known as orthologous genes,:7.6 and often perform the same or similar functions in related organisms.". Is that enough to answer the question?