Final answer:
To add body and weight to fine hair, one should use volumizing products and lightweight conditioners. These products are formulated to add lift and strength without weighing the hair down, unlike heavy oils which could lessen volume.
Step-by-step explanation:
For individuals with fine hair who are seeking to add more body and weight, the best approach is to use targeted hair care and styling products. Specifically, d) Use volumizing products is the correct choice. Volumizing shampoos, conditioners, and styling products are specially formulated to add lift at the roots, provide lightweight moisture, and avoid overburdening the hair with heavy oils that can cause it to lay flat and appear limp.
It is important to look for products that contain ingredients designed to support volume, such as proteins that add strength and structure to the hair shaft. Using a lightweight conditioner can also be beneficial, as it hydrates the hair without weighing it down. In contrast, applying heavy oils to fine hair can exacerbate the issue of lack of volume, and avoiding styling products altogether could miss an opportunity to add the desired body.