I feel like it’s chemical reaction
Answer: I think Windows.
Explanation: The absorption of light makes an object dark or opaque to the wavelengths or colors of the incoming wave: Wood is opaque to visible light. Some materials are opaque to some wavelengths of light, but transparent to others. Glass and water are opaque to ultraviolet light, but transparent to visible light.
A warm room. sound travels faster in places with more excited molecules.
When it crossed the sternum and is snug around the lap
Mercury
Good luck on this!
Have fun