Answer:
D. .................................
Im not quite sure, but i believe its B. Acinar Cells_digesting carbohydrates
Water pollution is the contamination of water bodies, usually as a result of human activities. Water bodies include for example lakes, rivers, oceans, aquifers and groundwater. Water pollution results when contaminants are introduced into the natural environment. For example, releasing inadequately treated wastewater into natural water bodies can lead to degradation of aquatic ecosystems.
No, though if you want to be 100% safe, use a special mask, but if you don't have one just a cloth or scarf will let you to be safe for about 1 hour
