In the past, a teacher has reinforced children for working quietly and independently after she announces "Pooh Bear Time to Hibernate." Now when she wants to set the occasion for quiet independent study she says, "Pooh Bear Time to Hibernate." This statement serves as a:.

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.