Which is not capital?

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.        

answer; i do believe that its(gestation,suction-aspiration or vacuum aspiration;

the vibration from the sound waves messed with the glass and it shattered.

hope this .

answer; the region experienced a surplus of food;