Answer:
B). sounds:
Step-by-step explanation:
The correct punctuation mark with the word 'sound' would be a colon(:) to fill the given sentence correctly. A colon(:) is primarily employed to introduce a list of items, an explanation, an example, or a quotation. Since the word 'sound' introduces the list of different sounds(of a crying baby...the thunderous cry of a mastodon), a colon would be appropriate and grammatically correct to be used. In the previous sentence, 'dinosaurs' follows a 'semicolon' to mark the pause between the two main clauses. Thus, option B is the correct answer.