Final answer:
The condition that was NOT part of the Treaty of Velasco was Sam Houston receiving a formal apology from Santa Anna for the invasion of Texas.
Step-by-step explanation:
The answer is d. Sam Houston will receive a formal apology from Santa Anna for the invasion of TX.
The Treaty of Velasco was signed after the Battle of San Jacinto, where the Texans achieved a decisive victory against the Mexican army. The treaty included several conditions, such as the Mexican army retreating south of the Rio Grande del Norte, all Mexican troops leaving Texas without causing damage, and the return of property taken during the invasion.