Answer:
Helen gives a speech at a PTA meeting about why the school should implement a uniform policy.
Step-by-step explanation:
An informative speech is a speech that intends to inform or educate a person or others about a certain topic. This type of speech will articulate and give more information about a subject that the audience already knows about.
Among the given sentences, the sentence about Helen and her speech during the PTA meeting is an example of an informative speech. Her speech intends to inform the attendees of the meeting about the reasons for the uniform policy implementation.
Thus, the correct answer is the first option.