Ben is prone to experiencing emotions in a much stronger manner than most other people. events that don't provoke any significant emotional response in the average person often send him into fits of happiness, anger, or depression. ben has a high level of

Ben has a high level of "affect intensity".

Affectively intense individuals encounter both positive and negative feelings all the more profoundly: when they're depressed, they're extremely miserable, and when they're excited, they're extremely cheerful like Ben in this example. Affect intensity is a steady individual distinction characteristic defined in terms of the usual quality of a person's responsiveness.

d. the polar jet stream   lies between the polar easterlies and trade winds should be your answer