For a pizza ordering form where you do not want the radio button selection labels to be truncated, the Stacked layout is the most appropriate. This layout will list the options vertically, giving each one adequate space and preventing truncation, which is particularly useful when the labels include longer text, such as a list of toppings.
Reference: Appian Documentation - Interface Components

When configuring a Write to Data Store Entity smart service node to write a new row to a CDT ' s corresponding database table, you must specify the data store entity where the CDT is stored. Additionally, you need to provide an input of the type that matches the CDT, in this case, an input of type ACME_video, which will contain the data to be written to the database.
References: Appian Documentation - Write to Data Store Entity Smart Service

To pass data into a process from other parts of an Appian application, you need to configure process variables. This is done on the Data Management tab within the Process Model Properties. Here, you can define process variables that can receive data from external sources, such as interfaces, other processes, or direct user input, when the process is started. These variables serve as placeholders for the data that will be used throughout the execution of the process.
Reference: Appian Documentation - Process Model Properties