Appearing first as a lowly weed, corn has, over the past several thousand years, become embedded in our food chain as a vegetable, a sweetener, and even a fuel. the long process of selecting, weeding, cultivating and fostering selected strains of the original weed is a form of

The correct answer is: Genetic modification

Explanation:

Genetic modification, also known as genetic engineering, refers to the use of biotechnology for the genetic manipulation of an organism.

This process involves altering the genetic makeup of an organism in order to produce improved and better organism. The organism produced with the use of this technique is known as the genetically modified organism.

Therefore, the given example of selecting the strains of original weed and then cultivating and fostering to produce genetically modified product is called Genetic modification.