The premise that effective leaders possess personal qualities that set them apart from ineffective leaders is based on the model.

The missing word in this question is the TRAIT Model. Trait theory of leadership/model shows the characteristics of successful and unsuccessful leaders. The lists of traits are being compared to the characteristic of the leader being examined. A successful leader should possess the following traits: self confidence, having a cognitive ability, being emotionally mature, and having a leadership potential.

answer; ///i believe that the correct answer is because the house and senate frequently pass different versions of the same bill;