Concept:The machine used for removing seeds from maize cobs is called a sheller.
Explanation:Maize grains are tightly fixed in rows on the cob.
Removing them by hand is slow and tiring.
A sheller separates the grains from the cob with mechanical force in less time.
It is sometimes referred to as a maize sheller.
A mill is used for grinding grain into flour, not for shelling.
A decorticator removes outer coverings such as husks or pods from seeds.
A winnower separates chaff and light impurities from the grain.
Therefore, the correct machine for removing seeds from maize cobs is the sheller.
Answer:D. sheller