Is a rain cloud a producer, decomposer, or consumer

Which of the following true? a_volcanoes and earthquakes often near the plate boundaries. b_volcanoes occur whereve there are tall mountains. c_earthquakes cause volcanoes in the same location to erupt violently d_volcanoes and earthquakes occur only where plates are colliding with each other

Which of the following best describes the formation of plasma?

If a reactant was removed, did the new equilibrium system shift to make more reactants or more products?