Which early 20th century Russian experimentalist believed choreographers should study the orchestral scores of their ballets so that their choreography would reflect musical qualities such as instrumental color and dynamics?

The answer is Fyodor Lopukhov.

Explanation:

Fyodor Lopukhov sought for a connection or balance between dancing and music, and held the opinion that, in order for choreographers to be able play their best orchestral music in terms of rhythm, dynamics and instrumentation, they had to be capable of analyzing the scores of their ballets. Lopukhov concentrated on ballets from a musical point of view, than from a dramatic/singing point of view.

the two things that develop a strong social foundation are: a. separation of church and states e. education received attention separation of church and states separate the illogical  argument that came from religious beliefs to a fact based belief. while education will make us remember the past to avoid the repeat of our mistakes.

a memoir is the correct answer