Final answer:
Without additional context, it is not possible to definitively answer the question regarding the subject of later dreams in 'Background, Casually.' However, based on the thematic content provided, one could infer that the themes might be related to freedom and independence. The correct option is b) Freedom and independence.
Step-by-step explanation:
In the poem 'Background, Casually' by A. K. Ramanujan, while it is not explicitly mentioned which type of dreams Ezekiel and Ashley have later in the poem, based on the provided text from LibreTexts identifying other work by Claude McKay, one could infer that the later dreams could potentially align with the themes of freedom and independence.
However, this is not directly addressed in the question's excerpts, and therefore a definitive answer cannot be provided without further context.
The excerpts provided suggest a focus on the themes of liberation and the profound impact that freedom and emancipation can have on one's dreams and aspirations, as reflected in the excerpt discussing the dreams of American Negroes following Emancipation.
Comparing the narratives, both men seem to describe freedom as a transformative and deeply desired state—almost a dream in its own right.
However, the actual content of Ezekiel's and Ashley's later dreams is not disclosed within the provided excerpts, so it is not possible to confirm whether their dreams are all of nature and tranquility, love and harmony, or dancing and music.
The correct option is b) Freedom and independence.