After kato's serious motorcycle accident, doctors detected damage to his cerebellum. kato is most likely to have difficulty:

Kato will face difficulty in coordinating and regulating muscular activity.  

The cerebellum is the prime characteristic of the hindbrain in all the vertebrates. In humans, the cerebellum plays an essential function in the motor control. It may also take part in some of the cognitive activities, like language and attention, as well as in controlling fear and pleasure responses.  

The cerebellum in humans does not begin the movement but takes part in precision, coordination, and accurate timing, it attains information from sensory systems of the spinal cord and from other components of the brain and assimilates this information to the fine-tune motor activity.  

several tissues working together form an organ, and several organs together make up an organisms.

the group of cell that carries out special jobs are tissue.

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.