To answer this question, we need to have knowledge about the different models of iPods released by Apple.
Let's go through each option to determine which one is not an iPod Apple has released:
Option A) iPod Mini - This option is correct. Apple released the iPod Mini, which was a smaller version of the original iPod.
Option B) iPod Nano - This option is correct. Apple released the iPod Nano, which was a smaller and more portable version of the iPod.
Option C) iPod Shuffle - This option is correct. Apple released the iPod Shuffle, which was a small, clip-on device that allowed users to listen to music in random order.
Option D) iPod Vision - This option is incorrect. Apple has not released an iPod model called the iPod Vision. This is the option that is not an iPod Apple has released.
Therefore, the correct answer is D) iPod Vision.