Answer: Irawaddy and Nathan are round characters.
Step-by-step explanation:
"Nectar in a Sieve" is a novel written by Kamala Markandaya. The story takes place in India, and explores the marriage of Rukmani, the daughter of a village headman, and Nathan, a farmer.
A round character is a well-developed character, which plays a crucial role in the plot of the story. These characters often undergo certain changes throughout the story, which makes them more familiar to the readers. Two examples of such characters are Ira and Nathan. Ira is a woman that is abandoned by her husband, which is why she becomes depressed. Nathan is presented as a hard-working farmer and a good husband, but he commits adultery and puts his family in a difficult position.