Answer:
A, and B.
Explanation:
A and B are the ones that are physical. The others are social and economic.
Answer:
In a federal system there is no centralized authority, while in a confederal system power is distributed equally among the states.
Explanation:
The Federal government is a type of government in which sovereign power rests with the central government, while in a confederal government political power rests with individual states and very little with the central government.
Answer: Combats social exclusion and discrimination. Promotes scientific and technological progress.