Through our relationships with others, we fulfill our need for
a. intimacy.
b. actualization.
c. autonomy.
d. independence.

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.        

what is the answer

answer; scientific;

'migration rates' are measurements of how many people entering or leaving a country. and if more people are leaving, this could cause a population to change.