EXERCISE 35–2 The colon, the semicolon, and the comma

Example:

When we opened the shed door, we discovered the source of the scratching noise; a baby raccoon trapped in a corner.

When we opened the shed door, we discovered the source of the scratching noise: a baby raccoon trapped in a corner.

In the second sentence, a colon correctly introduces an appositive.

For more help, see section 35a.