निम्नलिखित में से किस कारण से आकाश में बादल तैरते हैं? A. निम्न तापमान B. निम्न गति C. निम्न दबाव D. निम्न घनत्व

Clouds are made of tiny water droplets or ice crystals spread through a large volume of air, so their overall density is very low, close to that of the surrounding air, and rising air currents keep them up.