Natural minor
Here’s how to know.
First look at the starting note. It’s A. In the key of A there are three sharps: f# c# and g#. In the scale presented. There are NO sharps so we know it isn’t Major.
It has to be one of the three minors. In harmonic minor, the 7th scale degree is raised so that it is a half step from the top note. G is the 7th note and it is a whole step from A so it isn’t harmonic.
In melodic minor scales, the 6th and 7th notes are raised but again, the 7th isn’t raised so its not a melodic minor
Which leaves our answer to be natural minor.
Hope this helps!!
