What is the name of the voice assistant that is known for its natural language processing capabilities?

Apple's Siri Google Assistant Amazon Alexa Microsoft Cortana

The correct answer is Apple's Siri.

Siri is a voice assistant that is known for its natural language processing capabilities. It is developed by Apple and is integrated into Apple devices such as iPhones, iPads, and Macs. Siri is able to understand natural language commands and respond with relevant information or actions.