Final answer:
option a,For chemical services on hair with low porosity, a more alkaline solution is required to effectively open the cuticles and allow the treatment to penetrate the hair.
Step-by-step explanation:
The question pertains to chemical services on hair with low porosity and which type of solution is required. Hair with low porosity has cuticles that are tightly packed and resist absorption of moisture and chemicals. Solutions that are more alkaline can raise the cuticle and enhance the penetration of the solution into the hair, which is necessary for the desired chemical service. As hair porosity influences how hair absorbs and retains products, using a more alkaline solution facilitates the opening of the cuticles.
The reasoning behind this is that alkaline solutions have a pH higher than 7 and are capable of breaking down substances, very much like how a household drain cleaner, which is a very alkaline solution, breaks down things like hair clogs. Such alkaline environments enable the breakdown of the structural integrity of the tightly wound cuticle. Therefore, for chemical services on hair with low porosity, the correct answer is that it requires a solution that is more alkaline.