Why is race considered a "social construct? " race is a scientific way of grouping different types of people based on skin color or physical features. the scientific basis for racial difference rests on shaky ground, but is still accurate over half the time. physical variations in the human species have no meaning except the social ones that humans put on them. an increase in interracial marriages and children born of these marriages has given rise to new classifications?

The correct answer is the third option: physical variations in the human species have no meaning except the social ones that humans put on them.

Race is a social construct because factors such as beliefs, biases and prejudices that are prevalent in society lead generations of individuals to form beliefs about members of certain races. From a sociological perspective, while individuals belonging to different races might have variations in physical appearance, they do not have any other "real" differences. All the perceived differences across races are socially constructed. 

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. : )

good question. i'll be looking into that. (this is a joke sir)