Final answer:
Shampoo is used as a conditioning agent to remove oil accumulation from the scalp before styling.
Step-by-step explanation:
The conditioning agent used after a scalp treatment and before styling to remove oil accumulation from the scalp is shampoo.
Shampoo is a hair care product that is used to clean hair. It is applied to wet hair, massaged into the scalp, and then rinsed out. Shampoo contains chemicals that interact with the oil and dirt on the scalp, removing them and washing them away.
By using shampoo, you can effectively remove the oil accumulation from the scalp, leaving the hair clean and ready for styling.