"This morning, I will discuss the scientific, therapeutic, and physiological facts as well as myths about the effects and effectiveness of alternative medicine" is an example of which function of a speech introduction

- Previewing your key ideas.

Explanation:

The introductory part of a speech primarily aims to reveal the topic or subject matter to the audience and provide a preview of thesis of the key ideas that are going to be discussed throughout the entire speech as this not assists in capturing the audience's interest and attention but also in establishing the credibility of the speaker(knowledge reflected in the revelation of topic and thesis).

As per the question, the given example demonstrates the 'previewing of key ideas' aspect/purpose of the speech introduction as it reveals the subject matter and its key aspects('I will discuss the scientificof alternative medicine') that are going be discussed throughout the speech among the audience. This statement aware the audience about the content that is going to be presented to them that not only seeks their attention but the interest as well.

1. all of the above

2. sensory language

the author is intending to draw attention to the plight of refugees, editorial and biography support this. both workpieces make the reader empathize with enrique as well as with the other young migrants from central america. the writer, however, is using a different approach to each text.

the editorial includes strong words to persuade readers. he is trying hard to convince readers in the us to change its refugee approach.

the biography relies on narrative techniques and figurative language which the writer uses wisely in the setting, characterization, and personification to educate readers on the topic.