Me
state one negative and three positive economic impact of tourism? ?

Negative one is that they better be careful, And the three positive ones are that you get to cool this and number to is that you get to do fun things and number three is that Friends or other People are always there to help you.

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.