What does a natural sign (A natural sign has two vertical lines connected by two horizontal lines. The top horizontal begins two-fifths of the way down the left vertical line and travels right about one-third the length of the vertical line at a slight upward angle to connect with the top of the right vertical. The bottom horizontal begins about two-fifths of the way down the right vertical line and travels left about one-third the length of the vertical at a slight downward angle to connect with the bottom of the left vertical.) do to a note?

raises the note by one half step
raises the note by one half step
lowers the note by one half step
lowers the note by one half step
cancels the previous or stated accidental
cancels the previous or stated accidental
lowers the note by one whole step
lowers the note by one whole step

A natural sign cancels the previous or stated accidental on a note. It does not raise or lower the note itself.

A natural sign cancels the previous or stated accidental.

A natural sign in music notation is used to cancel a previous accidental, which means that it restores a note to its natural or original pitch.

In terms of the specific effect it has on a note, a natural sign lowers the note by one half step. This means that if a note is previously altered by a sharp or a flat, the natural sign cancels that alteration and brings the note back to its original pitch.

For example, if you had a note A that was previously raised by a sharp (A♯), if you apply a natural sign to it, it would cancel the sharp and lower the note back to its natural pitch, which is A.

In summary, a natural sign cancels any previous alteration to a note and brings it back to its natural pitch (the note without any sharps or flats). And in terms of pitch, it lowers the note by one half step.