Final answer:
Dependency treatment focuses on teaching a co-dependent person to say 'no' and reinforcing their self-worth, while manipulation involves deceptive or harmful actions. Treatment involves setting and enforcing clear boundaries.
Step-by-step explanation:
In dependency treatment, one strategy is to teach a co-dependent person to say 'no' and affirm that they're a good person despite setting boundaries. This empowers them to prioritize their own needs and build healthier relationships. In contrast, manipulation is characterized by actions that are deceptive or harmful, which undermine the autonomy and well-being of others. For treating such patterns, it's essential to set clear boundaries and consistently enforce them to protect oneself from manipulative influences and to establish a ground of equitable interaction.