How does Amazon Lex integrate with other AWS services?

Amazon Lex is designed to facilitate the creation of conversational interfaces using voice and text, and one of its key strengths is its ability to integrate seamlessly with other AWS services. The integration with AWS Lambda allows developers to build backend business logic that can be executed in response to interactions with the chatbot created via Lex. This enhances the application's functionality by allowing it to access databases, APIs, or perform complex calculations on-the-fly based on user inputs.

Additionally, Amazon Lex works well with AWS Polly, which enables the conversion of text responses generated by Lex into lifelike speech. This is particularly useful for applications that require verbal interaction with users, making user experiences richer and more engaging.

The other options suggest limitations or incompatibilities that do not reflect the true capabilities of Amazon Lex. Option A and C imply that Lex functions independently or cannot work with other AWS services, which is not accurate as its design encourages integration. Option D restricts its functionality to Amazon S3, which is not the case; Lex is capable of integrating with various services that expand its capabilities far beyond just storage solutions.