Users will need Reporting and Limited Email permissions, along with other appropriate settings to appear in the Query Builder, to perform this task
Send an email to parents or guardians by going to "Reporting" in the left-hand navigation menu and selecting "Query Builder."
Note: Make sure to set up a specific query to be used as a subquery and save that accordingly. This will be used as the subquery. For more information, see the resources on the People Query Builder.
From there, set up the appropriate filters, then click the "Add subquery" button within the query section. When it says "No query selected. Choose one now.," click on that option.
Select a condition such as Is Parent Of, Is Family With, or Is Married/In a Relationship With. Then choose a query based on that relationship.
For example, with Is Parent Of, parents are considered family managers and their spouses. In this case, the query would typically return children. With Is In Family and the other two relationship options, adjust accordingly based on the desired data.
After selecting the appropriate query, review or edit it as needed, then save it. Scroll down and click "Run Query" to generate the list of parents or guardians.
Finally, go to "Bulk Actions" and choose "Send email." This would send the email to those parents or guardians.