Give at least three reasons why tracking the informal sector of an economy is difficult.

Unofficial earning strategies (illegality in business): (1) Unofficial business activities: tax evasion, avoidance of labor regulation and other government or institutional regulations, no registration of the company; and (2) Underground activities: crime, corruption - activities not registered by statistical offices. 

Ican answer some, but not all! 2.) sensory info not being transmitted to the brian will result in a lack of responses that could be life saving. 4.) sensory adaption will helo people recognize certain images or objects that will give them a clearer understanding and expand their knowledge. them also become familiar with their surroundings. 8.) light the retina detect an object as it passes through the pupil and into the retina. 12.) cones in the retina us see color. they us see red. blue and green

It is c) binge drinking alcohol