Which term describes something that is easily managed or controlled?

The term that describes something that is easily managed or controlled is "tractable." In a broad sense, when something is tractable, it means that it is amenable to handling, manipulation, or management. This could apply to a variety of contexts, such as a problem that can be solved easily, a task that can be completed without excessive effort, or a person who behaves in a compliant and agreeable manner.

In contrast, the other terms indicate challenges or difficulties. "Intractable" refers to something that is difficult or impossible to manage or control. "Inflexible" suggests rigidity and an inability to adapt or change, which implies a lack of manageability. "Unmanageable" conveys the idea that something cannot be controlled or dealt with effectively. Therefore, "tractable" stands out as the correct answer, clearly aligning with the notion of being manageable or controllable.