Answer:
- Select a topic that matters to you.
Step-by-step explanation:
As per the given description, David's selection of topics exemplifies the piece of advice i.e. 'select a topic that matters to you' about choosing a topic as he has chosen a topic which he is interested in and to which he could connect. He has a connection, interest as well as a passion for the topic i.e. 'the economic hardships in the Philippines' that he has chosen and thus, he would be able to present this topic more effectively and persuasively. He could share his personal experiences(15-year experience) as well which would help him relate the topic more clearly, elaboratively, and persuade the audience more impactfully.