1 424 Quiz Question 8 of 10
Which of the following is the main purpose of a human community?
A To meet needs through collective effort
B. To make and follow rules through political process
C. To preserve culture and language
D. To analyze group behavior through observation

Ronald wants to see if a new shower cleaner works better in removing soap than his old cleaner. he uses the new cleaner on one half of the shower tiles and his old cleaner on the other half. identify the independent and dependent variables in this experiment. enter your answer in the space provided.