Fact 1: Vein deposits of gold and silver are formed by igneous intrusion.

Fact 2: If magma solidifies within the crust, the rock is called an intrusive igneous rock.

Given the two facts above, answer the question "What does magma form?" with the following options: 
- It gets heated up
 - movement of tectonic plates
 - objects that have mass
 - vein deposits of gold
 - fissures of hot, acidic water
 - adding heat
 - tectonic plates coliding
 - heating liquids


 

    vein deposits of gold     