Final answer:
William's parents in The Boy Who Harnessed the Wind were angry with the schoolmaster because they couldn't afford the school fees during a famine, leading to their son's educational opportunities being denied.
Step-by-step explanation:
The question pertains to the book The Boy Who Harnessed the Wind by William Kamkwamba and Bryan Mealer. In this memoir, William's parents become angry with the schoolmaster because they can't afford to pay the school fees due to a famine affecting their village in Malawi. Their situation is dire, and education becomes a luxury they can't prioritize over survival. Despite their son's eagerness to learn, the economic hardship and the school's inflexibility in accommodating their financial constraints lead to frustration and anger with the authorities who deny their son education.