The author presents information using a chronological structure in paragraph 2 and compare contrast structure in paragraph 3 Are these structures effective in supporting the authors thesis that musicians have used many keyboard instruments throughout history

right

explanation:

that is true because that is something they fulfill for their work.

the answer is: the start of world war i, and russia’s hopes of benefiting from it

during world war i russian joined due to in their current crisis they were being supported by france and the war was already declared to them by germany, they needed to maintain their political goal and leadership role in the balkans, and is the same feeling that this excerpt evoke the eager of maintain the land value.