Hello!
The term that describes the amount of water vapor in the air is absolute humidity.
Pollution adds heat to the air. for example: gas and smoke from cars and trucks etc. climate change will be affected because the heat will cause the weather and atmosphere around to get hotter. clearing pollution will keep the air cleaner.
I think all of them provide strong evidence, but the best would probably be the last one.
Hope this helps
A star's brightness is determined by the distance away from earth.
The answer to this question would be frequency.
The pitch of a sound makes is directly related to the frequency of the vibration. For every octave, the number of frequency will be increased 2 times. The frequency is influenced by various things. Changing the length of the instrument is the easiest method to change the frequency.
