Omar, an Arab American, avoids traveling by air whenever possible. If he must fly, he makes sure to arrive at the airport at least three hours in advance to go through a rigorous questioning and screening process. What term best describes his predicament?

The appropriate answer would be "Ethnic profiling".

Explanation:

The technique of prejudicing an individual exclusively predominantly depending on their ethnic heritage, particularly throughout cases involving accusations of violent acts as well as deliberate desires.Throughout Europe or their population, In place of the above term "Ethnic profiling", persons can utilize the other word i.e., "racial profiling."

Thus the above is the right term that describes Omar's predicament.

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.