Final answer:
The statement is true; Azure's PaaS solutions allow for scaling resources, including memory, by changing to a higher pricing tier which offers more resources and improved performance for web applications.
Step-by-step explanation:
The statement is true: A Platform as a Service (PaaS) solution, such as those that host web apps in Azure, can indeed be provided with additional memory by changing the pricing tier. Azure offers various tiers that include different resource allocations, and by moving to a higher tier, you can access more memory, as well as possibly other resources such as CPU and storage, which support higher levels of application performance and user load. This scalability feature is one of the core benefits of Azure PaaS, allowing users to adapt their resources to the changing needs of their applications.