Barack Obama is widely understood to be the first African American elected as President of the United States, even though he has a white mother. This demonstrates the concept of in the United States.

The one-drop rule.

His father was black, therefore he was "polluted" and considered black as well.

i would say byracial racial expanshion

Explanation:

the first one is d and the second a

the most likely outcome of fewer loon territories is that hawks would increase in proportion because the benefit of victory would be greater. hawks and loons are natural rivals of resources and victories in the game, since the lakes drying up affected the loons, the hawks would be benefited from the drought.