Detailed explanation and options for the selected question.
The concept of "Ecological Footprint" measures:
A.
The area of land required to sustain a population
B.
The carbon emissions of a country
C.
The population density of a region
D.
The biodiversity of a habitat
Explanation:
The ecological footprint measures the biologically productive area needed to support human activities. It is not limited to carbon emissions, population density, or biodiversity.