Question: Mary learned recently that mahogany is rougher than birch. This means that when she rubs her sandpaper over the _____ more friction is experienced (A) mahogany or the (B) birc  Do not use A and B to answer the question but instead, choose between "mahogany" and  "birch".
mahogany

Question: A father and his 8 year old son were having a rock throwing competition to see who can throw it the farthest. The son lost the competition because (A) he is weaker (B) he is stronger  Do not use A and B to answer the question but instead, choose between "Son" and  "Father".
Son

Question: A stick of gum that is slid across a classroom desk travels pretty slow compared to a stick of gum that is pushed across a home office desk. Which surface is the most rough? (A) classroom desk (B) home office desk  Do not use A and B to answer the question but instead, choose between "classroom desk" and  "home office desk".
classroom desk