You are presented with the question "What does magma form?" and the following answer choices: 
- 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

Now knowing that vein deposits of gold and silver are formed by igneous intrusion and if magma solidifies within the crust, the rock is called an intrusive igneous rock, choose the best answer.


 

    vein deposits of gold     