Environmental metrics such as the ecological footprint are most informative when they are considered along with other environmental indicators. Which indicator, when considered in conjunction with the ecological footprint, would provide the most information about environmental impact

Human population

Explanation:

From the options provided, human population is the best option because of the definition of ecological footprint as mentioned in the question.

Ecological footprint is a measure of the demand from humans on nature. This implies the quantity of nature that must be used in other for an economy or people to be supported. The demand from nature is usually tracked via an ecological accounting system.