In number 12 (up neatly) is a prep phrase
Cassiopeia failed to posses modesty I believe but let me check my answer<span />
Think of an equation:
200 - 91 = 109
You can do anything to this equation, as long as you do the same thing to both sides. So, if you add 91 to both sides, you will get:
200 = 200
Since this holds true, Susan's strategy to add her answer to 91 makes sense.
Answer: 1 and 3
Explanation: Acid deposition decreases the ph of lakes and rivers. Organisms are likely to be affected by increased acidity.
