Final answer:
An asterisk (*) is used to indicate a missing word in a phrase, signaling where to add an omitted element or where further clarification is needed.
Step-by-step explanation:
To find a missing word in a phrase, you would typically use an asterisk (*). An asterisk is commonly used in writing to indicate a place where something is omitted or where additional information will be provided later. For example, in the phrase 'She gave a * performance,' the asterisk could suggest that a descriptor is missing and needs to be filled in.
In the context of grammar and editing, an asterisk can signal to the reader or editor where to pay special attention for missing elements or further clarification. Therefore, among the options provided (Asterisk (*), Dollar sign ($), Percent sign (%), Pound sign (#)), the correct answer is A) Asterisk (*).