Why is DNA copying an essential part of the process of reproduction? and What is the importance of DNA copying in reproduction?

Will the answeres for theabove ques be same or different? If different then what will be the ans?

DNA copying mechanism is extremely necessary for reproduction as copying of DNA also generates variations during sexual reproduction. This variation leads to evolution. DNA copying is also necessary because  DNA (Deoxyribonucleic acid) is the genetic material found in the chromosomes, which are present in the nucleus of a cell. The DNA is the information site for making proteins and each specific type of protein leads to a specific type of body design and if DNA is not copied properly then offspring might face some serious abnormalities or might not even develop.