Which of the following groups is most responsible for deforestation caused by harvesting trees such as mahogany for their timber?
a. government-owned logging companies
b. large, privately-owned logging companies
c. illegal loggers who ignore limits and permits
d. small, family-owned businesses

the answer is C on E2020

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.        

if you are on the computer you can not take a picture but you can upload one but i am not sure about phones but i'm pretty sure it's the but to upload one just click the paper clip looking thing/ link thingy thing and upload a pic