Final answer:
Two parallel plots suggested by the excerpt are Clarence's ethical approach to purchasing land without hurting his father's feelings, and the potential for a romantic development given the historical and social context.
Step-by-step explanation:
Based on the excerpt from The Squatter and the Don by María Ruiz de Burton, the two plots that are likely to develop in parallel involve the complex relationships between the characters and the land they inhabit. Clarence Darrell is portrayed as a sensitive and respectful figure, contrasting with the aggressive land-grab attitude prevalent among other settlers.
Clarence wishes to purchase the Alamar's land without offending his father, showing a concern for ethics and family relations. This suggests that one plot will revolve around Clarence's efforts to ethically reconcile the land acquisition with his father's methods. Another anticipated plot involves the potential for romantic developments, given the setting and character dynamics, such as a possible encounter between Clarence and one of the Alamar daughters.
The interaction between Clarence and Victoriano points towards social and familial themes, including respect for property and tradition, as well as the importance of diplomatic negotiation and personal integrity. Themes of heritage and legacy will also be explored, as the Alamar family has owned their ranch for decades and their history is deeply entwined with the land. The narrative foreshadows the struggle between the different ways of life represented by the two families, rooted in the cultural exchange and conflict of the time.