2) Which type movement do pivot joints allow?

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

Iwll give extra points to who gets this for ! what type of reaction is this? ?

Avariable that is not being directly tested during an experiment should be