Final answer:
1) the base or support of something. The word 'foundation' is used in the sentence to mean the physical structure of a building and the principles or values of a country.
Step-by-step explanation:
The word 'foundation' is first used in the sentence to mean the base or support of something. It refers to the physical structure of buildings that provides stability and support. In the same sentence, 'foundation' is also used to mean the principles or values of a country. Here, it represents the fundamental beliefs and values that form the basis of America as a nation.