This reads like an ad and it's a bit stupid that you have to remember this for a test.

Free tier

3 options:

• Always free
• 12 months free
• Trials

Consolidated billing

With Orginisations.

Budgets

Allows you to get alerts when costs or usage exceeds (or forcast to) a set amount.

Cost explorer

See what costs what.

Support plans

AWS has:

Basic

• 24/7 customer service
• Documentation
• Whitepapers
• Support forums
• Trusted advisor
• Personal health dashboard

Everyone has access to this.

Developer

• Everything below
• Email customer support, 24 hour response
• Less than 12 if systems impaired

Business

• Everything below
• Trusted advisor's all options open
• Direct phone access to AWS engineers
• 4h SLA if production impaired. 1h SLA for production down.
• (extra free) infrastructure event management - plan for massive events.

Enterprise

• Everyone below
• 15m SLA for buisness critial workloads
• Technial account manager (TAM)

Marketplace

Name on the tin. Find, test, and buy software that runs on AWS.

Can use existing licenses. PAYG options too.