Correct answer will get

2nd one: divergent boundary

Explanation:

Earth's crust can come together and collide (a “convergent” plate boundary),

spread apart (a “divergent” plate boundary), and

slide past one another (a “transform” plate boundary).

no simpler subs form complex ones. synthesise = make

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.