4. How can you teach your younger siblings or relatives to help in protecting the environment? A Play under the trees C. Plant vegetables on available vacant lots B. Play with a kite, D. Throw stones on birds. 5. If you are going to dispose waste materials commonly found at home, what are you going to do with the decaying materials? A. Throw them in a compost pit . C. Mix them with non-decaying materials. B. Thrown them in the river. D. Keep them in the cabinet and use them again. 6. How should non-decaying waste be disposed? A. by composting B. by reusing C. by recycling For Questions No. 7-9 Choose the correct answer inside the box. D. both b and c​