Question: The size of a typical sandy beach, averaged over a few decades, is usually controlled by: Need Assignment Help? Group of answer choices The balance between loss of sand blown away to make sand dunes, and gain of quartz sand from weathering of the granite bluffs just behind the beach. The balance between net transport of sand to the beach by wintertime storms, and removal of sand from the beach by smaller summertime waves. The balance between sand supply from rivers or from coastal erosion, and sand loss to deep water. The balance between sand supply from glaciers and sand loss to the wind. The balance between sand dug up from below by crabs, and sand taken inland in the shorts of small beach-goers.