Final answer:
The main form of government practiced by the former Soviet republics is a federal republic, where power is divided between a central government and regional or state governments.
Step-by-step explanation:
The main form of government now practiced by the former Soviet republics is a federal republic.
After the collapse of the Soviet Union, many of the former Soviet republics transitioned from a communist regime to a more democratic system, with a federal republic being the most common form of government. In a federal republic, power is divided between a central government and various regional or state governments. This allows for a balance of power and local autonomy.
For example, Russia, the largest former Soviet republic, is now a federal republic with a president as the head of state and a bicameral legislature. Similarly, Ukraine and Kazakhstan are also federal republics.