May 19, 2014 - There are four types of economic systems in the world: traditional, command, market and mixed. Each has its strengths, weaknesses, sub-economies and ... function economically, as the economy is one of the strongest forces ...
Essentially, these guidelines are there to protect the participants from harm/distress. Therefore, they are safeguarding the wellbeing of the participants.
the change between day and night is caused by the rotation of earth on its axis ...the changing of lengths of day and nights depend on where you are on earth and the time of year. also, daylight hours are affected by the tilt of earth's axis and its path around the sun