The areas of the brain at work are the occipital lobe for processing incoming visual information and the left temporal lobe for language, verbal memory and information retrieval with its connections to the hippocampus.
Some exercises are more difficult than others as they simultaneously call upon several different skills. To succeed at this task, you will need to combine visual scanning and semantic memory. Many people process most language information using the left side of their brain.
Semantic memory is stored in the hippocampus and other regions of the temporal lobe.