What is the punctuation symbol used to indicate an explanation or emphasis?

The punctuation symbol used to indicate an explanation or emphasis is the colon (:).

Here's how it works:

* Explanation: The colon introduces a word, phrase, or clause that explains or clarifies the preceding statement. For example:

* "I have a favorite color: blue."

* "Here are the ingredients: flour, sugar, eggs, and milk."

* Emphasis: The colon can be used to emphasize a phrase or word that follows. For example:

* "This is what I want: a new car."

* "She had one goal in mind: success."

Note: The colon is not always used for emphasis. It can also be used to introduce a list or a quote.