This is one of the most important conceptual examples in the entire chapter, appearing under “Social Science as a Study of Disciplines.” It is frequently asked in exams because it demonstrates, in a single real-life scenario, how one event touches almost every discipline of Social Science at once. When writing this answer, structure it discipline-wise — mention environment, economy, politics, society, and culture separately with the specific impact of drought on each, exactly as the textbook does, to show clear understanding of interconnection.