<span>The cerebellum which is responsible for motor skills, experiences the most rapid growth during the first year of life. The cerebellum is also responsible for balance as well as muscle tone. The cerebellum is one of the most important parts of the brain.</span>
Because a single celled organism is not as adapted to the tasks at hand and is not as effective as a multi-celled organism. Having a multi-celled organism, specific cells in his body can perform specific tasks which grant him a faster exeuction time of these tasks as opposed to a single-celled organism.
The answer is: a pathogen
A pathogen is anything that can cause a disease, such as a virus or bacteria.
'Path' is like pathology and 'gen' is like generation/ creation.
When you catch a cold, it's typically a viral infection such as rhinovirus, so pathogen works.
C is the answer because water and carbon dioxide are left over after and
mitochondria is the thing in the cell that converts everything.