Concept:Intrusive volcanic landforms are created when magma cools and solidifies below the Earth's surface.
Explanation:Sills form when magma forces itself between layers of existing rock and hardens horizontally.
Dykes are formed when magma cuts across rock layers and cools as vertical or steep sheets.
Batholiths are very large underground masses of cooled magma.
All these features remain beneath the ground, unlike extrusive forms which reach the surface as lava.
Therefore, they are classified as intrusive volcanic landforms.
Answer:C. intrusive volcanic landforms