I believe passive transport is a form of diffusion. And it doesn't require any energy unlike active transport.
The answer is D.) the process where distribution of molecules is balanced out by their movement.
<span>Before an eruption, scientists look for gases and changes in the volcanoes shape, before an eruption the number and intensity of small earthquakes increases, this is caused by the movement of magma, prior to the eruption. Magma forms in the mantle and is a result of high temperature and low pressure.</span>
