What did Von Thunen study?

Adisadvantage of adding a vegetarian hot-food option to a school lunch menu is that it would a. force all students to change their diets. b. eliminate a meat option from the menu. c. only some students on special diets. d. increase the amount of food that is wasted.

Ships can transit between the atlantic and pacific oceans using the canal.

Fill in the combination notes for the main idea shown