As you find and obtain all the given items of one area on SR388, you will receive what are called Chozo Memories. Chozo Memories are Gallery Artworks that explains the story of how the Chozo first came to SR388 to research X Parasites, and how Metroids were ultimately created by the Chozo to destroy the X Parasites. However, after the X Parasites were destroyed - as the Artworks will show - the Metroids will begin to evolve and the Chozo will begin to take preventive actions against them.
How To Obtain All 11 Chozo Memories
Memory #1: Surface Area 100% Item Completion
Memory #2: Area 1 100% Item Completion
Memory #3: Area 2 100% Item Completion
Memory #4: Area 3 100% Item Completion
Memory #5: Area 4 100% Item Completion
Memory #6: Area 5 100% Item Completion
Memory #7: Area 6 100% Item Completion
Memory #8: Area 7 100% Item Completion
Memory #9: Area 8 100% Item Completion
Memory #10A: Complete Story Mode
Memory #10B: View All Other Chozo Memories