Explanation

Agents for Amazon Bedrock is the correct answer because:

• Agents for Amazon Bedrock are designed to execute multi-step tasks by invoking APIs and performing actions on behalf of users
• They can connect to external APIs to retrieve real-time data (like live flight prices)
• They can perform actions (like booking tickets) through API integrations
• This capability allows the AI assistant to go beyond just conversation and actually execute business processes

Why the other options are incorrect:

• A) Knowledge Bases for Amazon Bedrock: This is for retrieving information from company data sources, not for executing API actions
• C) Guardrails for Bedrock: This is for content safety and filtering, not for API integration
• D) Model Customization: This is for fine-tuning foundation models, not for external API integration

Agents for Amazon Bedrock provide the orchestration layer needed to coordinate multiple API calls and actions to complete complex tasks like flight booking.