Consider the following statements:

1.Nomadic herding or pastoral nomadism is a subsistence activity in which herders rely on animals for food, clothing, shelter, tools and transport.

2.Unlike nomadic herding, commercial livestock rearing is more organized and capital intensive.

3.In nomadic herding, the ranches cover large areas and are divided into a number of parcels, which are fenced to regulate the grazing.

4.In commercial livestock rearing, products such as meat, wool, hides and skin are processed and packed scientifically and exported to different world markets.

Which of the statements given above is/are correct?