Answer : Consolidation happens when two railroad companies are consolidated.
Step-by-step explanation:
Consolidation is usually the last step in the arrangement between two railroads and it is difficult to cancel it except in the case of bankruptcy.
Bankruptcy is a legal process through which people or any other entity who cannot repay debts to creditors must seek help from some or all of their debts. In this way, the different relationships among the Railways companies and the way they interact can be interrupted by these bankruptcies.
In the case of bankruptcy, the different parts of the railroad may be sold to different buyers.