Mark and tracy are fascinated with each other, care about each other, and want a special relationship with each other for the rest of their lives. according to the triangular model of love, their love would be called

I believe the answer is: consummate love

According to the triangular model, There are three factors that can be use to measure love, those factors are intimacy, passion, and commitment. Consummate love is the type of love that fulfil all of these three factors and considered to be the most ideal form of life.

this null effect is caused by a weak manipulation and ineffective internal validity. in a scientific study, as the one dr. morimoto is trying to perfom, internal validity refers to the confidence placed in the cause-effect relationship and to how well an experiment is done and able to eliminate confounding variables.        

the answer is d. amendments.