The correct answer is Amazon Mechanical Turk.
Amazon Mechanical Turk (MTurk) is a crowdsourcing marketplace that enables businesses and individuals to coordinate the use of human intelligence to solve a wide range of tasks. MTurk has over 500,000 workers in over 190 countries who can be hired to perform tasks such as data entry, transcription, image labeling, and survey completion.
Amazon Elastic MapReduce (EMR) is a cloud-based big data platform for processing vast amounts of data using open source tools such as Apache Hadoop and Apache Spark. EMR provides a managed environment for running Hadoop and Spark clusters on Amazon Web Services (AWS).
Amazon DevPay is a payment processing service that enables developers to sell their digital goods and services on Amazon. DevPay provides a simple and secure way for developers to accept payments from customers around the world.
Multi-factor authentication (MFA) is a security process that requires users to provide two or more forms of identification in order to access a system or application. MFA adds an extra layer of security to protect against unauthorized access.
In conclusion, Amazon Mechanical Turk is a means for accessing human researchers or consultants to help solve problems on a contractual or temporary basis.