Skills

what is a skill? what is a sense? how can I improve my skills?

1.  senses
    - sight     
    - hearing
    - smell
    - touch
    - taste
    - balance (Vestibular system)
    - proprioception
    - interoception 
2.  brain skills
    - response time
    - memory
    - visualization
    - critical thinking
    - creative thinking
    - self expression - language
    - mental endurance - ice bath
    - charisma
3.  physical skills
    - cardiorespiratory endurance
    - force
    - flexibility