Which statement best describes obstruction in baseball?

Obstruction in baseball refers to a scenario where a fielder, while not in possession of the ball, interferes with the progress of a runner. This can occur when a fielder is blocking the base path or otherwise impeding the runner's ability to advance. The specific case highlighted in the option indicates that a fielder is simulating a tag without actually having the ball, which aligns with the definition of obstruction.

The action of simulating a tag clearly demonstrates an attempt to confuse or impede the runner's path, which constitutes obstruction according to the rules. The nature of obstruction can be unintentional or incidental but still results in the appropriate call if the runner is hindered in their movement.

In contrast to the other options, the definition focusing on simulating a tag encapsulates the core behavior of obstruction, making it a key aspect of how the rule is applied during a game. Understanding this helps players and officials recognize instances where the rules of obstruction might come into play and how it impacts the game's flow.