Final answer:
The leaness measure that relies on electrical conductivity is BIA (Bioelectric Impedance Analysis).
Step-by-step explanation:
The leaness measure that relies on electrical conductivity is BIA (Bioelectric Impedance Analysis). This device is based on the fact that fat slows down the passage of electricity through the body. When a small amount of electricity is passed through the body, the rate at which it travels is used to determine body composition.