Answer:
I don't know if this is right but try it. The amount of water vapor in the air is called absolute humidity. The amount of water vapor in the air as compared with the amount of water that the air could hold is called relative humidity. This amount of space in air that can hold water changes depending on the temperature and pressure.
Answer:
Tree sap flows over the leaf and preserves it.
Explanation:
Amber would preserve the image.
It means is where something is removed or erased completely or something unwanted or unpleasant.
Hope this helps and the right meaning of expunge.