Agriculture and permanent settlement... 1. Developed mor than 100,000 years ago, 2. Resulted in a unlimited resource supply, 3. Allowed growth of specializationand trade, 4. Encourage humans to live nomadic lives.

I'm going to say 4. enjoy your day!

Explanation:

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; /// the statement is false,false,false;