In addition to (1) a set of grievances among a group of people, (2) resources, (3) a supportive environment, and (4) a sense that its members can make a difference in politics, what else do social movements require?

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.

answer; (b) knowledge based summaries of our beliefs and feeling about the self in particular domains;

answer; have joints that fail from excess by early the accumulated effects of unnoticed infections,all of these things are possible for a person born without the ability to feel pain;