Two wet glass slides stick together because the adhesive force acting between the glass and water is responsible for sticking up of the slides , the water trapped between the slides has a lower pressure as compared to the atmospheric pressures
For the cause of the gas in our air
I think the correct answers from the choices listed above are options D and E. You should not use context clues when you feel unsure of your guess and the surrounding words are also unfamiliar. Hope this answers the question.
The answer is the letter a
