Foliated rocks are distinguished by a. layers c. large mineral grains b. lack of layers d. air holes

The correct answers i the option (a) layers.

The foliated rocks are those rocks, which forms by the alignment of the minerals due to pressure. These rocks are a type of metamorphic rocks. The alignement of the minerals makes them to align in the layers. Hence, the layers present in the rocks are distinguished by the presence of layers of different mineral bands.

answer; /// i believe the correct answer is (reactants);