Final answer:
AWS offers four support plans: Basic, Standard, Business, and Enterprise. The Basic plan is free, and the other plans offer increasing levels of support, with the Enterprise plan offering the most comprehensive support features.
Step-by-step explanation:
The four support plans offered by AWS (Amazon Web Services) are Basic, Standard, Business, and Enterprise. The Basic plan is free and provides access to documentation, whitepapers, and support forums. The Standard plan includes business hours email access to Cloud Support Associates, while the Business and Enterprise plans provide 24x7 access to Cloud Support Engineers, with varying levels of response times and additional benefits such as a Technical Account Manager (TAM) for the Enterprise plan.