The correct option is (A). Poaching disturbs the food chain by reducing prey animals like deer and boar. With less food available, tigers starve or move to new areas, causing population decline. This indirect effect of poaching weakens the tiger ...
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The correct option is (C). Resource development benefits overall progress only when supported by technological advancements and proper institutional systems. Technology ensures efficient use of resources, while institutions promote fair distribution, sustainability, and innovation, leading to long-term economic and social ...
A is true but R is false. Rusting of iron is a chemical process but not endothermic; it is a slow exothermic reaction, releasing little heat. Since the heat released is negligible, it often goes unnoticed, making the given ...
The correct option is (a) Broken down by biological processes. Biodegradable substances like food waste, paper, and leaves decompose naturally through bacteria and fungi, turning into harmless products. They don’t accumulate in the environment and are eco-friendly compared to plastics. cbse ...
The correct option is (c) CFCs; Ozone. In 1987, the Montreal Protocol was signed to stop production of chlorofluorocarbons (CFCs), which deplete the ozone layer that protects Earth from harmful ultraviolet radiation. This step helped save the ozone. cbse sample paper ...