The lookupproperty which determines whether a list can be editedor notis the AllowvaluelistEdits.
The allowvaluelisteditsproperty is a lookup option which is used to grant users the permission to addnew values to an existingitems or use onlythe values inthe lookuplist.
These propertyis useful in that it provides a sort of specificationto the lookupoptions grantedto users.
Hence, the missing phrase is Allowvaluelistedits.
Learn more : https://brainly.com/question/25686567