What best describes the use of modular architecture?

The use of modular architecture is best described by the ability to reduce the risk of changes impacting the whole system. In a modular architecture, the overall system is divided into smaller, manageable, and distinct modules or components. This design allows teams to work on individual modules independently. When a change or update is needed, it can often be executed within one module without requiring extensive alterations to other modules or the entire system.

This characteristic greatly enhances maintainability and scalability, as developers can focus on one component at a time and ensure functionality while keeping the rest of the system stable and operational. It leads to faster deployment cycles and reduces the potential for widespread system failure due to changes, a significant advantage in complex applications.

Regarding the other options, combining various technologies into a single unit is a feature of certain integrations or architectures but doesn't specifically relate to the principles of modularity. The idea of eliminating communication between modules contradicts the concept of modular architecture, where modules often need to interact efficiently. Lastly, ensuring all modules are interdependent goes against the principle of modular design, which aims for a high degree of independence so that each module can function and be tested independently.