Answer:
Specificity principle
Explanation:
The specificity principle indicates when a speaker is able to speak with specific way and with precision. In athletic field, the term defines moving from general to specific.
In the similar manner, the principle of specificity works in public speaking. An orator, who used the principle of specificity moves from general point of view to specific point of view. This priniciple requires to eliminate any ambiguity and provide precision and clarity.
In the given scenario, Laila moved from general to specific details. First, she detailed that how poverty is a world-wide problem then she described poverty in America and then move to specificity, describing poor conditions of her home town.
Thus, she has used the principle of specificity.