Danielle is happy to learn that her best friend from her hometown is on the phone. however, the sadness in her friend's voice causes danielle's mood to change from happy to sad. this change in mood resulting from the tone of her friend's voice is called

Emotional contagion

Explanation:

In psychology, the term emotional contagion refers to the phenomenon by which one person's emotions trigger similar emotions in other people. In other words, individuals tend to express and feel emotions that are similar to the ones from the people they are interacting with.

In this example, Danielle is happy at first but then, while talking on the phone with her friend, the sadness in her friend's voice causes Danielle's mood to change from happy to sad. We can see that Danielle friend's sadness triggered feelings of sadness in Danielle too. Therefore, this change in mood resulting from the tone of her friend's voice is called Emotional contagion.

d.

thist title points out that you are explaining the nature of the u.s. government. it is the most specific. a representative government consists of a government where decisions are taken according to a voting system. the most essential aspect of a representative government is found in the different structures where voting rights are granted to different groups of people. for example, voting for governor, mayor, president, local police chief etc.