The rocks formed by the cooling of magma and crystallization are igneous rocks. They include basalt, scoria etc.
The correct option is:
Option D. non-banded grains
This can be explained as:
- Grain shape is a characteristic that can be used to differentiate different types of rock surfaces and structures.
- Jagged grains are textures having sharp ragged edges.
- Coarse grain material has few discrete particles. They are not hard and are ductile.
- Non-banded grains do not have bands and layers on their surfaces.
Therefore, the given image is of non-banded grains.
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