Speak clearly is the correct answer because it means to say words in a clear voice so the listener can hear and understand them easily.

This phrase is useful in classroom discussions, presentations, phone calls, and everyday conversation. Clear speaking helps prevent confusion.

Examples: Please speak clearly when you read the sentence aloud. During the presentation, Maria spoke clearly so everyone could understand her.

The other choices are incorrect because ask for a ticket means to request a ticket, and tell your name means to state your name, not to speak in an understandable way.