Notice the intermittent stream that drains from the upstream end of the alluvial fan system a (that you have already colored yellow) to the playa at e. how would the grain size of the sediments along this stream change as you walk downslope from the highest part of the fan, up in the canyons, to the playa (e)? why?

What the question i don't get it do u mean what she needs to do to auctually become one

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.