needed help with a few question below,

1. What are Choudry, Hanley & Shragge (2012), referring to when they talk about "The limits of local work and activism"?
2. What do McKnight and Kretzmann say are the limitations of needs-based approach, and why do they believe a strength-based approach is more effective?
3. What is "community intervention"?
4. What is the difference between what Murray Ross calls a "functional community" and what he refers to as a "geographic community"?
5. What is the difference between "organizing and mobilizing" in the language of social movement theory and practice?
6. What is the "strength of weak ties" proposition in social network theory?