1.Scientists ascribed the practice of selective breeding and human agriculture to CHANGES IN CLIMATE AND CHANGES IN THE MIGRATORY PATTERN OF MAN. Scientists believe that selective breeding and human agriculture took firm root when the earth climate become warmer and man, who is used to moving from one place to another, began to stay in one place and cultivate wild grains, nuts and fruits for food.
2. Agriculture changed the wandering manner of movement that the early man was used to. Due to agricultural practice, people started to settle down in groups and form permanent or semi permanent communities. The formation of communities enhance human relationships among people and encourage their interactions.