Question

select the misplaced or dangling modifier.
echoing throughout the cave, judith listened as droplets of moisture fell from stalactites overhead and splashed at her feet.

Explanation:

The phrase "Echoing throughout the cave" is a participial phrase that incorrectly modifies "Judith"—Judith cannot be the thing echoing. The sound of the dripping droplets is what should be echoing, making this a dangling modifier.

Answer:

Echoing throughout the cave