Final answer:
The Adult rule of 9's for the Anterior Trunk is the estimation of 18% of the total body surface area affected by burns.
Step-by-step explanation:
The Adult rule of 9's is a method used to estimate the percentage of total body surface area (TBSA) affected by burns. For the anterior trunk, the rule states that it accounts for 18% of TBSA. This means that if the front of the trunk is affected by burns, it would be estimated as 18% of the total body surface area.