Moira's mother told her that all the girls in the third-grade were very nice. So, when Moira sat down to eat with her classmate Henna, she believed that she would be nice. Moving from a general premise about a class to a conclusion about a particular member of the class is called:

The correct answer is Deductive reasoning.

Explanation:

Deductive reasoning is the logic process of reasoning linking the premises with the conclusions starting with a general premise and moves to a particular premise which ultimately leads to a consecuent conclusion. In this case the first premise is that all the girls in third-grade are nice and the second premise is that Henna is a girl from third-grade therefore the conclusion is the belief that Henna is going to be nice because she is part of the girls in third-grade. That is a Deductive reasoning (top-down logic).