Correct answer is (a) Reciprocating mower
Best explanation: A mower is a machine that cuts (mows) grass or other plants that grow on the ground. Mowing is different from reaping, which uses similar implements, but is the traditional term for harvesting grain crops. Sickle mowers, also known as reciprocating mowers, bar mowers, sickle-bar mowers, or finger-bar mowers, have a long bar on which are mounted fingers with stationary guard plates.