2. If the pH of water is altered by sulfur oxide, nitrogen oxide, or carbon dioxide, what effect can this have on our atmospheric water?

Sulfur oxide,carbon dioxide and Nitrogen Oxide are acid anhydride.

Explanation: they are refer to as acid anhydride, because when they dissolved in water,they make the water acidic by reducing the Ph of the water.These gases are greenhouse gases that are released into the atmosphere by human activities like combustion, burning of bushes etc,.when they are released into the atmosphere and have contact with atmospheric water, it leads to acidic rain.

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.

age range would be the answer