Final answer:
The adductor brevis muscle attaches on the linea aspera above the adductor longus muscle.
Step-by-step explanation:
The adductor brevis originates on the inferior ramus of the pubis and attaches immediately above the adductor longus on the linea aspera. The linea aspera is a roughened ridge that passes distally along the posterior side of the mid-femur. It serves as the attachment site for multiple muscles of the hip and thigh regions.