A company wants to make a chatbot to help customers.

Comprehensive and Detailed Explanation From Exact AWS AI documents:

Prompt engineering is the primary method for controlling tone, style, and behavior of foundation model responses.

AWS generative AI guidance explains that:

Prompts can define tone, voice, and response structure

Iterative refinement ensures consistent outputs

Prompt refinement requires no model retraining

Why the other options are incorrect:

Token limits (A) affect length, not tone.

Batch inferencing (B) affects processing mode, not response style.

Higher temperature (D) increases randomness, reducing consistency.

AWS AI document references:

Prompt Engineering Best Practices

Controlling Model Output Tone

Using Prompts with Foundation Models on AWS