Final answer:
The word 'tall' does not require a spelling change before adding the suffix '-er.'
Explanation:
To determine which word does not require a spelling change before adding the suffix '-er,' we need to consider how the word ends. In this case, the word 'tall' ends just before the letters 'er,' making it the correct option as no spelling change is needed. The other words – 'pretty,' 'ugly,' and 'slimy' – would require adjustments before adding the '-er' suffix.
Learn more about suffixes in English words here:
https://brainly.com/question/45113470
