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.

the answer is culture

each morning i wrote my name

on the dusty cabinet, then crossed

the dining table in script, scrawled

in capitals on the backs of chairs,

practicing signatures like scales

while mother followed squirting

linseed from a burping can