Answer:
Social media is a collective term for online platforms where users provide content without or with minimal intervention from a professional editorial team, but by the pure and simple action of each user, who manages their profile according to their consideration. The main characteristics are the interaction and dialogue between users, who exchange data, files, knowledge and experiences through these means.
Thus, since the main factor of these media is social interaction, a situation may arise with positive or negative implications, depending on how said social interaction affects the user. Regarding the positive aspects, social media serve to reduce the gap of distance and time between users, allowing a more fluid communication in less time. In addition, it serves to, in cases, increase self-esteem and positive perception of oneself, through the approval that other users make of the posted content.
A cultural system creates a unique world that is experienced as "reality" by its members. The people of a certain culture come to accept the "realities" which form its culture.
However, when groups of different cultures come together, their "realities" become confronted. Creating a clash of cultures. The outcome of this clash is decided by the material power of each of this groups. The group with the most material will emerge victoriously and end up influencing the other group with its cultural system. Therefore, individuals from the influenced culture will end up learning a new "reality" by force. On the other hand, individuals of the influencing culture tend to see the others as "objects of study".
Clashes of cultures have been occurring throughout time, affecting the cultural authenticity of groups. Due to the constant blend of cultures, it is nowadays, very difficult to consider that a certain cultural group is "truly authentic".
True ,Early humans were able to move out Asia into North America during an Ice Age because of a land bridge.