Difficult babies with an intense and highly reactive temperament tend to be

Difficult babies with an intense and highly reactive temperament tend to beirritable and unpredictable.
If a baby is difficult, it means that it may be quite demanding to deal with it. The baby may cry all the time, be generally irritable and dislike anything that the parent does. It is also unpredictable, meaning that it cannot be predicted what the baby is going to behave like.

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.