The rocks have a dark and woody brown colour , they don't include fossil deposits, They can be glossy or course and can't react with acid. About 95% of the earth's crust is made of them.
- As per the image the rock appears to be that of igneous nature and hard rock may be coarse grain, has a visible and large sized crystal, and thus is an extrusive type of rock that has slow cooling.
Hence the correct options are B, D, and F. That is evidence of slow cooling, large crystals and coarse texture.
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