Which of the following is a behavioral feature of a block?

A behavioral feature of a block is best represented by operations. In systems modeling, particularly in the context of block definitions and interactions, operations define the behaviors or functions that a block can perform. They are essential for encapsulating the logic that dictates how a block interacts with other blocks and responds to various stimuli or conditions within a model. Operations can be invoked to execute specific tasks, influencing the behavior of the block during simulations or when integrating with other components.

Understanding that operations are linked to the actions a block can take helps clarify their role in system dynamics, making them crucial for modeling behavior effectively. Other properties such as reference properties, part properties, and ports serve different purposes in defining the structure and interfaces of a block, focusing more on the relationships and connections within the model instead of the specific behaviors executed by the block itself.