The correct option is D Introspection
The correct option is option D, 'Introspection'. It means to examine one's own thoughts and feelings. Option A 'Meditation' is the act of meditating which means to focus one's mind for a period of time in silence. Option B 'Retrospection' means action of looking back and reviewing past events or situations. Option C 'Reflection' is the image in the mirror. It also means return of light, sound , energy from a surface. Thus, option D is the correct option.