It would be plate tectonics, so A
As far as largest, its the pacific plate. Smallest has two answers: Juan De Fuca, off the coast of the American Northwest, is the smallest major plate, but of all plates, major and minor, the smallest is the Galapagos microplate.
Sustainable land management practices are important because they ensure continued food production. The correct option among all the options that are given in the question is the second option. Land management practices require a proper balance between economics and environment. I hope the answer helps you.