Personality tests are useful because

they define your core traits
they give you insights about yourself
they allow others to identify you by certain labels
they give people a topic of conversation

Personality test are useful because they define your core traits

Explanation:

Personality tests are a commonly used tool within the field of psychology. They are useful because they provide the central features of individuals.

Despite its effectiveness, it must be mentioned that there are more valid proofs of others and that the one that best suits the purpose will be used. Within the personality tests are the psychometric tests, those that start from a cognitive behavioral current and that are expected to be answered as honestly as possible. The second type of personality test is the projective tests, where unconscious elements are projected through creative or introspection exercises.

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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.