Which of the following statements about biodiversity is true?
a.
changes to biodiversity always positively affect an ecosystem.
b.
changes to biodiversity always negatively affect an ecosystem.
c.
changes to biodiversity can positively and negatively affect on an ecosystem.
d.
changes to biodiversity never affect an ecosystem.

Option C

Explanation: The biodiversity can be defined as the variety of plants and animals present in a particular habitat. This is usually considered to be very important and desirable for the ecosystem.

The changes biodiversity can be have a positive or negative effect on the ecosystem. The changes can be in the number of plants or animals which can even adversely affect the ecosystem if it is beneficial for the ecosystem.

There are times that loss of some plants and animals can positively affect the ecosystem if it is affecting the ecosystem in a negative way.

poor water quality affects most estuarine organisms, including commercially important fish and shellfish. the pollutants that have the greatest impact on the health of estuaries include toxic substances like chemicals and heavy metals, nutrient pollution (or eutrophication), and pathogens such as bacteria or viruses.

you did not attach the discourse, but i assume it to be the discourse on the origin and basis of inequality among men (the original titile in french is: "discours sur l'origine et les fondements de l'inégalité parmi les hommes"), also know as "second discourse". in this discourse, jean-jacques rousseau emphasizes that private property is the basis of all inequalities.

therefore, what enabled the old regime to maintain as long as it did was private property.