Quartzite is produced when grains of quartz in sandstone are welded together when the rock is subjected to high temperatures. Quartzite<span> or Quarzit is a hard, non-foliated metamorphic rock which was originally pure quartz sandstone. </span><span>It is formed when a quartz-rich sandstone is altered by the heat, pressure, </span>
Answer a) is incorrect as sound does not travel in a vacuum.
The first one It sends signals that control heart rate and respiration. I hope this helps :)
Answer:
You can increase the kinetic thermal water by many physical changes like boiling and even when it evaporates
Explanation: