Which statement represents current food production? 

A)  Input of labour required per unit of food has increased. 
B)  Food output in Canada has decreased. 
C)  Increases in efficiency of food production might not be sustainable. 
D)  Input of resources required per unit of food has decreased.

Food Production

The processes involved in generating food products for consumption, including agriculture, livestock breeding, and aquaculture.

Efficiency

The ability to accomplish a job with a minimum expenditure of time and effort, or the ratio of the output to the input of any system.

Sustainable

The practice of using natural resources in a way that maintains ecological balance and ensures availability for future generations.