Final answer:
The last step in Kotter's approach to change management is to Communicate the vision for change, which involves reinforcing changes through various mechanisms and ensuring the change is part of the organizational culture.
Step-by-step explanation:
The last step in Kotter's approach to change management is d) Communicate the vision for change. This stage is about ensuring that the vision for change is embedded into the organization's culture. It involves reinforcing the changes through mechanisms like policy, procedures, and incentives, to solidify the new state. Strong social cohesion and communication are crucial to this step, as they help in building a consensus for change. The final phase emphasizes the need for continuous promotion and demonstration of the value of the new changes to ensure that they are not undermined or lost.
Additionally, it's worth noting that Kotter's model includes a step titled c) Consolidate gains and produce more change, which can be confused with the final step. However, communicating the vision regularly and embedding it into the organization aligns with the last step of reinforcing the change and making it stick.