Which amendment protects americans' right to "keep and bear arms"?

The second amendment gives Americans the right to "keep and bear arms"

Hope I helped

work yay..other than that pretty good actually it hot though (≧▽≦)

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.