Which of the following was a reason for the creation of greek colonies

Things such as fear of overpopulation, the lack of land on the mainland of Greece and the economic expansion of Greece in the revival following the bronze age collapse were good reason for the creation of Greek colonies. Most of these colonies were established in order to trade with other civilizations.

Ifound the exercise on the internet. attached is the list mentioned above.in order for a compound to be considered optically active it can't have any axis or plan of symmetry. the molecule  shouldn't also  be superimposable on its mirror image.with such considerations, the compounds that are optically active are: -third compound on the first image is optically active; -second and third compound from the second image are optically actives.

Sometimes but itt depends, their is a lot if drugs on campus too so you really can't just say that