Based on this figure rank the following luminosity classes in order of increasingsize. Smallest Items (6 items) (Drag and drop into the appropriate area) IV WD square disappointed square stainless square according square I Items in order .

To rank the luminosity classes in order of increasing size, we need to understand what each class represents:<br /><br />1. **WD (White Dwarfs)**: These are very small and dense stars, typically about the size of Earth.<br /><br />2. **IV (Subgiants)**: These are stars that are slightly larger than main-sequence stars but smaller than giants.<br /><br />3. **III (Giants)**: These stars have expanded and are much larger than subgiants.<br /><br />4. **II (Bright Giants)**: These are larger and more luminous than regular giants.<br /><br />5. **I (Supergiants)**: These are the largest stars, with sizes much greater than any other class.<br /><br />Based on this understanding, the order from smallest to largest is:<br /><br />1. WD<br />2. IV<br />3. III<br />4. II<br />5. I<br /><br />So, the ranked order of luminosity classes in terms of increasing size is:<br /><br />- WD<br />- IV<br />- III<br />- II<br />- I