Final answer:
The cable was tied to a column as its literal use in the passage. The metaphor of birds and a snare represents entrapment and doom, but doesn't imply the cable's use for catching birds.
Step-by-step explanation:
The cable in the passage was tied to a column. The extended metaphor involving birds and a snare is describing the fate of the characters in an allegorical manner, suggesting entrapment and inevitable doom, similar to birds caught in a snare. However, there is no direct mention of the cable being used to catch birds or make a snare, hence we cannot determine that the cable served those purposes. Instead, the cable's literal use, as stated in the passage, was to be made fast to a column.