Final answer:
An OED initiative focusing on the expansion and future challenges of several departments is an Organizational intervention. This type of OED aligns strategies and objectives across the entire organization, leading to multi-level improvements.
Step-by-step explanation:
An organizational effectiveness and development (OED) initiative that focuses on several departments expanding or facing future challenges is likely an Organizational intervention. This is because the initiative is not limited to individual performance improvements (which would be an individual intervention) or just enhancing team dynamics (which would be a team intervention), but instead, addresses the functionality and success of multiple departments within the organization. In such cases, the OED intervention aims to align the organization's strategies with its goals and objectives, leading to improvements across various levels within the organization, often involving changes to processes, culture, structures, or strategies.