Answer:
Establishing your credibility to speak on the topic
Explanation:
The first part of an introduction when giving a speech or lecture is to establish your credibility to speak on that topic. This is important to get your audiences attention, it could be achieved by talking lightly about your credentials and experiences in that field. The statement "I have worked at the Arizona Humane Society for ten years, and have seen the effects of the failure to spay and neuter your pets first hand" is the speaker establishing his/her credibility to speak on the topic.
