Complete the sentence. the higher the hydrogen ion concentration, the the ph. higher lower closer to 7 closer to 14

Higher the hydrogen ion concentration, lower will be the pH.

Solution:

The negative logarithm of hydrogen ion concentration in mol per litre of the solution.

pH= power of hydrogen ions

As we can see from the formula ,if the concentration of hydrogen ion is inversely proportional to pH.

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.