Online communities offer many individuals to adopt different disguises, thus concealing their true identities and enabling them to be more mean or callous. This is an example of how contribute(s) to deindividuation.

anonymity                                                                

Explanation:

Deindividuation generally occurs when an individual's identity with a specific group overrules his or her self-awareness and identity. It hinders an individual's capability to think critically.

According to the "deindividuation theory", the term 'anonymity' denotes a person's loss of concern and self-awareness towards self-evaluation within a particular group setting and therefore enables a person to participate in aggressive or anti-normative behavior.

As per the question, the given statement is an example of how anonymity contributes to deindividuation.

answer; the importation of slaves from africa,//   is the correct answer.

they all focused on themes about the inevitability of death.