You are creating a Cloudformation template that will be used to automate the provisioning of VPC’s and Subnets. You need to allow for dynamic provisioning aspects as to which Availability zone the subnet needs to be created. Which part of the template would help in provisioning such dynamic values?

Answer options:

A.Parameters
B.Output
C.Tags
D.Change Sets

Answer – A
This is also provided in the AWS Documentation.
Parameters
"Use the optional Parameters section to customize your templates. Parameters enable you to input custom values to your template each time you create or update a stack".
Option B is invalid since this is used to specify the Output values of a template.
Option C is invalid since this is used to specify additional tags for the template.
Option D is invalid since this is used to specify changes in a CloudFormation template.
For more information on Cloudformation parameters, please visit the below link
https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/parameters-section-structure.html