Could the increase in algae in the neighborhood lake be related to Sara’s farm?

The increase in algae could be related to Sarah's farm due to her use of fertilizer to grow her crops Fertilizers contain high amount of nitrogen and help produce strong, healthy crops but they can also wash into lakes and rivers. It is however likely that the lake contains some of the fertilizer from Sarah's farm.

answer; i believe that the correct answer is (a) potassium(k)

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.