UPSC Essentials  brings to you its initiative of subject-wise quizzes. These quizzes are designed to help you revise some of the most important topics from the static part of the syllabus. Attempt today’s subject quiz on  Environment and Geography  to check your progress. Gear up for UPSC Prelims 2026—Practice smarter, revise faster, and succeed with our  Special Quiz Magazine . ( Click Here ) 1. These hippos are considered an invasive species. 2. The ‘cocaine hippos’ are thriving in the fertile region of Colombia. 3. They are native to South America and have evolved in the Amazon basin. 4. Their population is declining rapidly due to natural predators. How many of the statements given above are correct? (a) Only one (b) Only two (c) Only three (d) All four Relevance: The question highlights real-world case studies linking biodiversity with human activities. Aspirants should read about the invasive species and their ecological impacts.…