How does the corona of the Sun affect earth

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

Ihat will happen if i added baking soda to vinegar

Which change to the system wood cause the freely-moving piston to lower?