concentration (n)

The noise outside made concentration difficult.
There was a look of intense concentration on her face.
I find that yoga improves my powers of concentration.
The student's concentration was evident as they immersed themselves in studying for the upcoming exams.
The chemist needed a high level of concentration to accurately measure and mix the chemical compounds.
The athlete maintained intense concentration during the crucial moments of the game, leading to a decisive victory.
The noise in the crowded café made it difficult for the writer to maintain concentration on their work.