Answer: Patch the host operating system's software

## Explanation According to the AWS Shared Responsibility Model: - **AWS Responsibility (Security OF the Cloud)**: AWS is responsible for protecting the infrastructure that runs all services offered in the AWS Cloud, including: - Host operating system - Virtualization layer - Physical security of facilities - Network infrastructure - Hardware infrastructure - **Customer Responsibility (Security IN the Cloud)**: The customer is responsible for: - Managing IAM users and permissions - Managing database schemas and data - Configuring security groups and network access controls - Managing application-level security **Why Option C is correct**: - Patching the host operating system's software is AWS's responsibility in Amazon RDS - AWS manages the underlying infrastructure, including OS patching and maintenance **Why other options are incorrect**: - **Option A**: Configuring IAM users is the customer's responsibility - **Option B**: Managing database schemas is the customer's responsibility - **Option D**: Configuring security groups for database connections is the customer's responsibility This division of responsibilities allows customers to focus on their applications and data while AWS manages the underlying infrastructure security.

Author: Ritesh Yadav