Which of the following sentences needs a comma to be correctly punctuated?
my mother writes and edits for a major publication.
my mother and my father edit a gardening magazine.
my mother writes for a magazine and my father edits novels.
my mother writes for a magazine that my father edits.

The sentence that needs a comma to be correctly punctuated is the third one - My mother writes for a magazine and my father edits novels-

The correct punctuation would be - My mother writes for a magazine, and my father edits novels-

This is a clear example of a compound sentence.

Compound sentences have at least two independent clauses and are linked by a coordinating conjunction, such as: for, and, but, yet, etc. In this case, they are linked by the conjunction AND.

We use a comma before the conjunction that connects the two independent clauses.

explanation:

family is anyone that you care for and they equally care for you, family sticks together and everyone loves one another, whether they are blood or not anyone can be family. family composition is the makeup of a family, including the number of members, their ages, and their relationships to each other.