A relationship in which participants interact according to general social roles rather than unique individual identities is called a: a. true friendship. b. personal relationship. c. romantic partnership. d. social relationship.

d. social relationship.

Explanation:

The social relationship refers to the relationship in which the individuals share their feelings, expressions with a view to enjoy the moment. It is a type of get together where many individuals from different religions, cultures, etc to share their views and participate in the event through interacting with the people so that they could enjoy the event.

b) to encourage free trade

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.