Are these answers correct?

Punctuation within Sentences—Colon
1. The book had three different features: a hard-bound cover, a ribbon for a bookmark, and the author’s signature.

Punctuation within Sentences—Colon
2. German grammar is simple: In that language, there are no exceptions to the rules.

Yes, both answers are correct.

In the first sentence, a colon is used to introduce a list of different features of the book. The colon is often used in this way to indicate that what follows is a list or an explanation.

In the second sentence, a colon is used to introduce a statement explaining or elaborating on the first part of the sentence. It is used to clarify that the simplicity of German grammar is the explanation following the statement.

To check if the answers are correct, you can verify the use of the colon within sentences. A colon is typically used before a list, an explanation, or a statement that elaborates on the first part of the sentence. By understanding the purpose of a colon and checking if it is used appropriately in the given sentences, you can determine if the answers are correct.

Yes, both answers are correct.