Final answer:
According to complexity theory, engagement mainly involves Bottom-up interactions, highlighting the importance of local interactions in global system behavior and dynamics.
Step-by-step explanation:
According to complexity theory, the principle you are engaging is Bottom-up interactions. This theory emphasizes the importance of local interactions and their effects on global system behavior, suggesting that components of a system have interconnected relationships that evolve over time. Systems are influenced by the decisions of individuals and their power dynamics, which can affect their overall structure and function. Examples include individual-based models (IBMs) and the stochastic dynamic methodology (StDM), which allows for a granular understanding of system dynamics, leading to phenomena like emergence and complex system characteristics.