Acid A, assuming the two acids have the same pH. The M stands for molarity which is how concentrated a substance is (basically the higher the molarity the more concentrated the acid is). However, pH refers to how acidic a substance is. If the two acids have different levels of acidity, the answer may be different.
Add an alkaline compound to raise the pH to 7.2.
The length of the seasons would increase
It's called Ice Wedging :)
Aluminum! hope this helps