Joshua vividly recalls his feelings and what he was doing at the exact moment when he heard of his grandfather's unexpected death. This best illustrates:

The scenario involving Joshua vividly recalling his feelings and actions at the moment he learned of his grandfather's unexpected death exemplifies flashbulb memory. Flashbulb memories are detailed and vivid recollections of significant or emotionally charged events. They stand out due to the intense emotional impact associated with these moments, which often leads to stronger and more durable memories compared to everyday experiences. This type of memory allows individuals to capture not just the facts of the event but also the context and emotional feelings surrounding it.

In contrast, sensory memory pertains to the brief retention of sensory information, while the next-in-line effect refers to the phenomenon where individuals may forget what they had to say when waiting to speak in a group. The serial position effect relates to the tendency to better recall the first and last items in a list. None of these concepts directly relate to the vivid recollection of an emotionally significant event like the one Joshua experienced.