Examine the efforts made to improve the conditions of Scheduled Tribes.

c is the answer for this

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 branch of biology that deals with the normal functions of living organisms and their parts.

the way in which a living organism or bodily part functions.