Explain how a true acid wave, with a pH below 7.0, can cause the hair to swell.

Services raise the pH in the hair to a alkaline state in order to soften and swell the hair shaft. Disulfide, hydrogen, salt. Side bonds are responsible for the strength and elasticity of the hair. Altering these is what make wet setting, thermal styling, permanent waving, curl reforming, and relaxing possible

A pH of 7 is neutral, a pH below 7 is acidic, and pH above 7 is alkaline. ... Chemical Texturizers raise the pH of the hair to an alkaline state in order to soften and swell the hair shaft. This action lifts the cuticle layer, and allows the solution to reach the cortex layer where restructuring takes place.

Explanation:

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.