A bear cub who has a bad experience with a wolf may conclude from that experience that all big furry animals that growl (other than adult bears) should be avoided. On the other hand, the bear cub probably differentiates between the wolf and a mouse. The mouse might be furry, but it is not big and does not growl. Thus, it is not a danger. A child who has been frightened by a dog may generalize and stay away from all dogs. But the child continues to play with his or her stuffed animals, even if they are dogs.

answer and explanation;

volcanic rocks are igneous rocks which form from lava, molten rock which has been thrust out of a volcano onto the surface of a rocky body such as an asteroid, planet, or dwarf planet.  

plutonic rocks are igneous rocks which form from subterranean chambers of molten rock or magma. plutonic rocks make up the base of continental crust as well as oceanic crust. their slow rate of formation causes them to be coarse grained since there is plenty of time for large crystals to form before the magma solidifies into rock.

the textural difference is that plutonic rocks are more coarse grained than volcanic rocks. plutonic rocks are coarse grained while volcanic are fine grained ; glassey or fragmental. since fine and coarse are adjectives the decision as to whether a rock is fine or coarse grained is generally made on the bases of whether or not the individual crystals can be seen in most if the rock.

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