#class10science #study #class10 #class10th #motivation #class9 Master Our Environment Class 10 Science Chapter 13 in ONE SHOT with Samridhi Sharma (PW) 🌍. Full NCERT + PYQs explained — covering Ecosystem, Food Chains, Trophic Levels, Energy Flow, and Ozone Depletion. Perfect for CBSE Class 10 Board Exams 2025–26, quick revision, and concept clarity in Biology. 💯