The two criteria of abnormal behavior are subjective discomfort and inability to function normally
Subjective discomfort is one sign of abnormality when the person experiences a great deal of subjective discomfort or what we call emotional distress while we engage in a particular behavior.
While inability to function normally is a behavior that does not allow a person to fit into society or function normally can also be called and labeled as abnormal.
D hope this helps sorry if I'm wrong
Answer:
Sagittarius A* is the name of the black hole region that creates the gravitational force holding the Milky Way together.
I'm not sure what question 4 is. If you could add both the picture and the question, that would be great.