Arre bhai, the obvious answer is a 'well-defined variable with a sensible range,' but let me tell you, *thoda sa ghar ka dukh* taught me otherwise. Choose one variable you can actually measure fifty times in your grandma's kitchen if your Jio fiber decides to take a holiday for a week. My IA on enzyme kinetics under 'variable soil pH' was a disaster—collecting and testing all those different soil samples was impossible with my unstable WiFi for research and Kota trips for my brother. Keep it so simple you could do it in one afternoon, because you never know when you'll be conscripted for a family wedding or a router reset.
#exams#study
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