Sylvia suffers from a nervous tic of washing her hands repeatedly and being unable to resist washing them again and again. Which perspective would explain Sylvia's hand-washing behavior as a result of repressed, unconscious conflicts?

psychodynamic perspective                                      

Explanation:

The psychodynamic perspective was introduced with the work of one of the most influential psychologist named Sigmund Freud and is described as a phenomenon that emphasizes an individual's "unconscious psychological processes" such as a few specific fears or wishes for which an individual is not completely aware, and contends that a person's childhood experiences are considered as important in determining or shaping his or her adult personality.

In the question above, Sylvia's hand-washing behavior is determined by the psychodynamic perspective.

two jet streams that directly affect the formation of weather in the continental part are a polar jet and a subtropical jet. they are responsible for the transportation of weather systems, which directly affect people. the polar front is the boundary between cold air from the north pole and warmer equatorial air. both the polar jet and the subtropical jet blow from the west to the east, and follow the boundary between cold and warm air.

the strongest jet streams are polar jets, while subtropical jets are somewhat weaker.

the right answer is c. the polar jet stream is generaly stronger than the subtropical jet stream.