Direction:  A passage is given with question following it. Read the passage carefully and choose the best answer to each question out of the four alternatives.
Nobody can argue that the acquisition of knowledge is more fun and easier with computers. The mere activity of touching and exploring this device constitutes and enjoyable task for a child. This, accompanied by the relaxing attitude and software interactivity, usually contributes to a better grasping of new knowledge. At a higher educational level the availability of digital books, simulators and other academic materials provide the student with an ever accessible source of information, that otherwise would not be at hand. But, besides the increasing complexity and behaviour of intelligent software, which is usually embedded in the academic digital material, the need for human interaction in the learning process will always be present, at least in the foreseeable future. There is the necessity for a human being to the able to determine what the specific needs of each individual are. A computer, no matter how sophisticated its software is, can hardly mimic the expertise  of a teacher in how to explain and adapt complex concepts to different individuals.
What other factors related to computers contribute to a deeper acquisition of knowledge ?