What are the two things Christakis discovered about how social networks work?

Christain discovered that the increase or decrease in obesity can be tied to social networking and how it affects human emotions and how they are viewed

Explanation:

Social grant could have both positive and negative impacts on teen mothers.

Positive impacts:

Social grants would give a certain amount of money to teen mothers each months in order to cover their basic expense. This would help the teen mothers to get by while trying to seek additional income from a more stable job.

Negative Impacts:

Social grants could make teen mothers became too dependent on government assistance to get by. When being used incorrectly, this would prevent them from seeking a more stable job.