When being observed increases evaluation concerns, occurs; when being lost in a crowd decreases evaluation concerns, occurs. a. deindividuation; groupthink b. groupthink; social facilitation c. social facilitation; deindividuation d. social loafing; social facilitation

social facilitation, social loafing

Explanation:

social loafing is the occurrence which arises when a person is exerting less effort to achieve a goal when he or she works in a group than when working alone and is seen as one of the main reasons groups are sometimes less productive than the combined performance of their members working as individuals.

Social facilitation is defined as improvement in an individual performance when working collectively with other people rather than alone. In addition to working together with other people, social facilitation also occurs in the mere presence of other people.

answer; earthquake;

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.