Question

As a way of facilitating social change, tweets and hashtags are a new social phenomenon in which people are able to use social media in an effort to:

Answer 1

I believe the answer is: organize and protest political politics
In the past, it was extremely difficul for activists to increase awareness for the cause since they do not have other media to speak up other than television or newspaper. Now days, with the help of social media, there is no barrier of entry for activist to speak up and incrase public awareness for the cause.