Moraines occur through a geomorphological process during a moving glacier. Basically, the glacier motion picks up debris such as rocks, sediments, etc. and deposits them, thus creating moraines. So, your correct choice is D. GLACIERS.
<span>Moraines are parallel ridges of debris deposited along the sides of a glacier. The unconsolidated debris can be deposited on top of the glacier by frost shattering of the valley walls and/or from tributary streams flowing into the valley.
</span><span>Moraines are caused by <u>D. GLACIERS</u></span>
