The statement that best analyzes why the Russian Soviet Federated Socialist Republic was the most powerful Soviet socialist republic in the Soviet Union is:
"The Russian Communist Party and the head of the government ran the state from that location."
This is the most accurate explanation because the Russian Soviet Federated Socialist Republic (RSFSR) was the central hub of power in the Soviet Union, housing the primary governing bodies and institutions of the Communist Party, which allowed it to exert significant influence over the other republics. While size and other factors contributed to the RSFSR's power, the concentration of political authority in Moscow was pivotal in cementing its dominance.