Percentage of knowledge gained through observation/vision is:

Research in educational psychology and learning theories consistently indicates that a significant majority of knowledge is acquired through visual input. While exact figures can vary slightly across studies, 75% is a commonly cited percentage representing the dominance of observation and vision in the learning process. Our brains are highly adept at processing visual information, making it a primary channel for understanding and retaining new concepts and data.

• Options 40%, 50%, and 60% are lower figures that do not accurately reflect the widely accepted proportion of knowledge gained through visual means, which is generally understood to be much higher.