The neolithic era was best characterized by

Neolithic is known to be the time of the Agricultural revolution: the time when people developed farming, domesticated animals and started having settled lifestyle, as opposed to their previous lifestyle of hunting and gathering.

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.