What type of device, the value of protective color, and the relative nature of the fitness of flounder, which lives in marine waters near the bottom.

1) Type of coloring – patronizing – merging with the background of the seabed;
2) the ability to change the color of the upper side of the body makes the fish invisible against the background of the soil, allowing you to hide from enemies and from possible prey.
3) Fitness does not help with the movement of fish, and it becomes noticeable to enemies

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.