Complex sentence: The Gladers are offered the chance to restore their memories, and it is also revealed that the controlling device in their brains will be removed in the process, whereby Thomas, Teresa, and Aris will no longer be able to communicate telepathically.
Split into simpler sentences: The Gladers are offered the chance to restore their memories, and it is also revealed that the controlling device in their brains will be removed in the process. This means that Thomas, Teresa, and Aris will no longer be able to communicate telepathically.