An elongated hill that is composed of unsorted sediments deposited by a glacier is called
(1) a delta
(2) a drumlin
(3) a sand dune
(4) an outwash plain

I believe the correct answer from the choices listed above is option 2. An elongated hill that is composed of unsorted sediments deposited by a glacier is called a drumlin. These occur widely within the moulded and streamlined scenery of the central lowlands of Scotland. 
Hope this answers the question. Have a nice day.

(2) a drumlin

Explanation:

The word drumlin is taken the form an Irish word droimnín, recorded in 1833, its is a classical elongated hill and is composed of the glaciers depositional features and has unconsolidated matters formed by continuous and reverse depositions by the glaciers.  Also called as baskets of egg topography.  They typically distance ranges from 1 to 2 km and thus are called primary glacial till. They have clay, silt, sand, gravel and the boulders that fall from the glaciers and get deposited in various proportions.

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