Answer:
Isolated.
Explanation:
The term cordon as a verb is defined as to form a protective or restrictive perimeter around something.
In the context of the excerpt, a reference to the heart of a struggling mother and her child is being made, suggesting it is being taken away from the reach of others in order to make space for her child alone. The word isolated seems to fit as a synonym for cordoned, as it just as well means to set apart a particular thing from others.
