Which type of rock is non-foliated metamorphic rock?
o
gneiss
limestone
marble
o
slate

Marble is one type of "non-foliated metamorphic rock".

Option (c);

EXPLANATION:

Metamorphic rocks are the rocks that are formed by "heat, pressure and chemical" processes. This usually happens due to the "friction and distortion" caused by the "tectonic plates" deep below the earth surface. There are two kinds of metamorphic rocks: "Foliated Metamorphic rocks"."Non-Foliated Metamorphic rocks". The "non-foliated" ones are formed around "igneous intrusions" where the temperatures are very high but the pressure that is applied on the "recrystallizing rock" is equal in all the directions.Marble is composed of "calcium carbonate" and is produced by "metamorphism of limestone or dolostone". There are no layers in a "non-foliated rock", so they appear granular and have a random shape. The "atoms are tightly packed" together as the minerals in the "rock recrystallize" into larger sizes.

It explains why rocks appear in layers