What is a ‘keystone species’? By Rabia Anum ✅ Fact Checked 📊 Difficulty Medium 📅 Last Updated 13 Aug 2026 A. Indicator species B. Pioneer species C. Species with disproportionate ecosystem impact D. Invasive species Check Answer 💡 Explanation: A keystone species has a critical role in maintaining the structure of an ecological community (e.g., wolves, bees). 📚 Topics: Conservation Environment and Conservation 🎯 Exams: CSS GEN NTS PMS
