An advantage of using narratives in your speech is that they:
a. explain abstract concepts.
b. calm emotions.
c. create excitement.
d. clarify technical ideas.

An advantage of using narratives in your speech is that they: (A) explain abstract concepts.

A narrative often details the writer's or speaker's personal thoughts and emotions and as such is a vehicle to explain abstract concepts that may not be easily understood by readers and listeners.

Yes, eat dark chocolate in moderation

Explanation:

If you eat too much dark chocolate, you may experience immediate unpleasant symptoms such as indigestion, headache and heartburn. Chocolate's mild psychoactive effects could also produce a feeling of alertness and elation, followed by lethargy and depression. Dark chocolate, a semisweet blend of at least 70 percent cacao powder plus sugar, milk and other ingredients, could also cause rapid weight gain. If you eat moderate amounts of dark chocolate, you should see benefits rather than health problems