i'll take a shot at this
Narwhals can be called whales of ice: in icy channels, ponds and ice-shielded bays they seek sanctuary from killer whales, their chief predator, and their annual migrations following the seasonal rhythm of advancing and retreating ice.
A. their annual migrations following
B. their annual migrations which follow
C. their annual migrations follow
D. whose annual migrations following
E. whose annual migrations follow
Now, NOTE THE SEMICOLON (:). This splits the passage
...
Narwhals can be called whales of ice: in icy channels, ponds and ice-shielded bays they seek sanctuary from killer whales, their chief predator, and their annual migrations following the seasonal rhythm of advancing and retreating ice.
A. their annual migrations following
B. their annual migrations which follow
C. their annual migrations follow
D. whose annual migrations following
E. whose annual migrations follow
Now, NOTE THE SEMICOLON (:). This splits the passage
...
