The primary function of DNA is to store genetic material. DNA contains the instructions needed for an organism to develop, function, and reproduce. It carries the genetic code that determines an individual's traits and characteristics. This genetic material is passed down from parents to offspring, ensuring the continuity of species. DNA is organized into genes, which are specific sequences of nucleotides that encode for proteins and control various biological processes. Therefore, DNA's main role is to store and transmit genetic information, making it essential for the inheritance and evolution of life forms.