Which of the following is a potential drawback of heavy use of NPK fertilizers?

A.) Low levels of aluminum and manganese
B.) Decrease in mineral salts
increase in nitrate levels
C.) High soil pH

the correct answer is c   with the systems

i believe it's c. the trait for large beaks will be passed on to future generations through natural selection.

since eventually smaller beaks would have to find another source of food or even eventually just die out from the lack of food.