refers to establishing how and when a piece of evidence as received; how it was maintained or stored while in each person's possession; what changes, if any, it underwent in that person's custody; and how it left that person's custody.

The answer is Chain of custody.

Explanation:

In legal contexts, chain of custody can be defined as the chronological documentation or paper trail in which there is a record related to some aspects concerning evidence. They include the sequence of custody, control, transfer, analysis, as well as the disposition of evidence.

The term is also used in aspects related to civil litigation, in drug tests made in athletes, as well as in aspects regarding supply chain management. Chain of custody has been considered a difficult process to show evidence in court. Now however, with the establishment of new portable technology the chain of custody is considered much shorter and in this way, evidence can be processed in a better way.    

new communications technology has affected the way social movements are organized because nowadays, social movements rely on social networks and the media to get different people with a similar way of thinking in contact, and thus, get them to mobilize for a greater cause.

individuals only participate in collective action when they feel identified with it. is in this aspect that social media becomes relevant, because it guarantees communication among all individuals and organizes the social actions that are going to be carried out, i.e., the social movements.

in addition, being covered by the media is important to validate the message and make it relevant in the social agenda, as well as to reach more people who can share interests, appealing to public sympathy for their cause.

in conclusion, it is by social networks and social media that social movement is given birth; by connecting different individuals with similar ideas and organizing them to mobilize for a greater cause.