3. Intext questions III

Due to the cooling of fogg bodiesheating of oxygen bodiescooling of water bodiesheating of water bodies and other biological activity, water evaporates. The air heats up and rises as well. It expands and cools as it rises, forming tiny droplets. These droplets expand and form clouds as they spread easygrow smallergrow largermelt easy. The process is facilitated by the collecting of dust and other suspended particles.