Mountains support Wegeners idea by how he saw that the same species on one mountain was the same on a different one thus causing him to believe that the earth is forming or making mountains in some way.
Types of farming include subsistence farming, mixed farming, nomadic herding, commercial plantation, livestock rearing, etc.
Clothing in Africa is worn long and loose because it is too hot to wear tight clothing, but they still need coverage to protect themselves from bugs.
Increased productivity is the main contributor to economic growth in U.S. agriculture.
Respiration of carbon dioxide by plant roots can lead to the formation of carbonic acid which can chemically attack rocks and sediments and help to turn them into soils. There are a whole range of weathering processes at work near the surface of the soil, acting together to break down rocks and minerals to form soil.
