4. There are plenty of non-biodegradable materials in our environment found in the canals, rivers and oceans like plastic bags, plastic cup, styrofoam, mask and face shield float in the bodies of water? Why does these materials float? * A. It can trap water. B. The materials are non-porous. C. Materials can resist in water, dense and non-porous. D. Materials are hard and non-porous that cannot absorb water.​