discretion

"The student's ability to concentrate in noisy environments was crucial for success in the class. "

"Do I have a choice of what color to paint it?"

"My knowledge of history helped me understand the current political situation better. "

"I was going to go shopping, but I went dancing instead."

"He is a student of life."

"My sister was discreet about her upcoming surprise party, telling only close friends. "

"Quality of life is usually determined by health, education, and income."

""The team's success depends on making good decisions." "

"Being aware of the danger of upsetting her audience, she was somewhat circumspect in her comments."

"The teacher's judgements on the student essays were fair and helpful. "

"I am watching a movie. "

"Despite her parents' disapproval, Sarah pursued her dream of becoming a musician. "