What do nomads gather?

There are actually 3 categories for nomads: First is the "hunters-gatherers" or known as foragers, they gather wild fruits and vegetables. Second is the "pastoralism", they move depending on the available of their resources and they pastures for their livestock. pastoralism uses animals to use the milk as their dairy products, the skin or wool or other animal hair to use as clothing, manures as fertilizer and fuel. The last is the "peripatetic" nomads, they are widely skilled in crafting and trading their works to others.