What is known as the act of giving "mental connection to a given task" or unit of information

The correct answer is letter "B": attention.

Explanation:

Attention is the mental activity by which individuals focus their attention on a given subject they are dealing with. By doing this, people leave behind any other situation around to concentrate only on the task they are given. This scenario takes place in complicated exercises that push people's knowledge to the limit or when the exercise is of interest or important for the individual.