Which of these sentences is a possible summary of the scene? The other dog’s job is to help the other dogs, so she helps Buck. Buck does not like being fussed over, because he has gotten so tough. In the wild, all dogs become tough and only care about their own survival. The other dog treats Buck kindly by licking Buck’s sores as a doctor would clean a wound.

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.