Which of the following roles, according to the shared responsibility model, is responsible for securing the company’s database in an IaaS model for a cloud environment?

In an Infrastructure as a Service (IaaS) model, the cloud provider is responsible for the underlying infrastructure (e.g., virtualization, servers, networking, storage). However, the client (your company) retains responsibility for the operating systems, applications, data, and database security. This includes configuring database access controls, patching the database software, and encrypting data within the database. The "Third-party vendor" is too broad and not specific to the shared responsibility model. While a "DBA" (Database Administrator) is a role within the client's organization that manages the database, the overall responsibility for securing it ultimately falls to the "Client" as the entity contracting the IaaS service.