The correct answer is: B. devoted
The word “devoted” means to give or apply (one’s time, attention, or energy) to a particular purpose or pursuit. In this case, the man is devoting all of his energies to the task at hand.
The other options are not as accurate. The word “brought” means to cause someone or something to come to a particular place. The word “put” means to place something in a particular position or location. The word “organized” means to arrange or order things in a systematic way.
In this case, the man is not causing his energies to come to a particular place, he is not placing them in a particular position or location, and he is not arranging or ordering them in a systematic way. He is simply giving or applying them to the task at hand.