Answer:
A. less than one
Explanation:
The Ferris wheel was designed by  George Washington Gale Ferris Jr in 1893. It consist of a large rotating wheel with capsules or cars that are used to carry people.
The mechanical advantage is less than one because the input force is greater than the output force. 
 
        
             
        
        
        
Answer:
A group of individuals of the same species occupying a particular geographic area. Populations may be relatively small and closed, as on an island or in a valley, or they may be more diffuse and without a clear boundary between them and a neighboring population of the same species.
 
        
             
        
        
        
Propane is a gas. The atoms diffuse throughout the house.