Final answer:
The brain divides its attention and resources when faced with complicated visual or mental tasks, allowing it to allocate resources efficiently and process the necessary information.
Step-by-step explanation:
When faced with complicated visual or mental tasks, the brain tends to divide its attention and resources to handle the multiple demands. This is because complex tasks require the involvement of different areas of the brain, such as the visual sensory areas, integrating areas, and motor areas responsible for moving the eyes and pressing buttons.
These areas are distributed throughout the brain, and when activated, the brain shows activity in more than just 10 percent of its regions. The brain's division of attention allows it to allocate resources efficiently and process the information needed to complete the tasks.