The earliest human settlement sites were located in a. forest areas b. desert areas c. river valleys d. mountain region

The correct answer is C. River Valleys.

Explanation

The first human settlements were next to the river valleys due to the importance that water had (and still has) in the lives of humans, this natural resource was too important for humans because it allowed them to hydrate and made the soil fertile for agriculture, that is to say that it allowed societies to have plants that provided them with fruits for their food, besides water was an important resource for grazing animals such as sheep, cows, deer among others. So, the correct answer is C. River Valleys.

if interdependence implies a two-way dependence, and if each partner is equally dependent on the other for success, then there is an equal commitment to the making the partnership successful. the advantage is sustainability of the relationship, the disadvantage is that decisions are "democratic" and therefore may take longer to reach and more likely to be a compromise (which is not always the best solution). as the interdependence moves away from equality, the decisions become more influenced by the more independent partner. in the extreme the relationship becomes more dictatorial and more like "master-slave". generally the relationship has less commitment in both directions and is more likely to be temporary.

if one generalizes (and one shouldn't), equity partnerships, which is probably what is implied by interdependence, can be slow to progress or change but durable. the extreme alternative, independent-dependent partnerships tend to be efficient but more fragile.

hope this but you will have to site your own evidence. : )