The document discusses different types of ambiguity that can occur in writing. It defines ambiguity as occurring when a word, phrase, or sentence can have multiple possible interpretations and it is unclear which meaning is intended. Ambiguity can be caused by words with multiple meanings or structural elements in a sentence that allow for more than one grammatical reading. To avoid ambiguity, writers should make sure the intended meaning is clear from context or rephrase ambiguous sentences. Structural ambiguity can sometimes be resolved by restructuring the sentence. The overall document provides examples and explanations of different sources of ambiguity to help writers identify and address ambiguous elements in their own writing.