Select all that apply. A nation is a group of people united by:

1. a common language
2. a shared history
3. a shared border
4. a common currency
5. a common culture

a common language

5. A common culture.

Explanation:

That's what I think it is, I hope it helps.

answer; ///i believe the correct answer is the empire state building;

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.