Here's why:
* Modifiers describe or change the meaning of other words in a sentence. They can be adjectives, adverbs, or phrases.
* Tall, slouched, and withered are all adjectives that can modify nouns (e.g., "tall tree," "slouched posture," "withered flower").
* Dead is generally considered a state of being rather than a descriptive modifier. While it can be used in some figurative language, it doesn't typically function as a modifier in the same way as the other words.