How has nearly all the food we eat been "genetically modified" in the broadest sense of the term?

Question

Quizplus · Accepted Answer

Nearly all the food we eat has been genetically modified in the broadest sense through centuries of selective breeding and cross-breeding to enhance desirable traits such as yield, flavor, and resistance to pests. This traditional form of genetic modification predates modern laboratory methods of genetic engineering.

How Has Nearly All the Food We Eat Been "Genetically