Describe the tectonic positions in which magmatic activity occurs on Earth and explain how magma forms in these places.Explain the changing role and changing power of the farmer in agriculture with respect to the rise of agribusiness and agricultural restructuring (see slide 43) (2). What element of the production chain (or commodity chain) does the farmer have the most power over (1)? Give an example of this power relationship or any of the other ones described in the diagram from one of the case studies
