Concept:While growing a crop, the steps followed are:Digging the soilThis is an important step as it creates air spaces.Ploughing the soilIt is done to aerate the soil to ensure good plant growthEarlier it was done using bullock carts which are now replaced by tractorsSowing seedsIt means scattering/spreading seeds on earth.Seeds are spread in uniform numbers at equal intervals.Watering seedWater is an important element for the growth of the plant.It can be done either manually or using irrigation facilitiesA large number of irrigation facilities such as tunnels, canals, handpumps are available.Removing weedsWeeds are unwanted harmful plants that grow around main crops.Hence it is important to remove them to ensure proper growth of the crop.HarvestingIt is the final step in which mature crops are cut and send for commercial use.Explanation:Onion cultivation:The right amount of seeds are dropped at a regular distance.It should be done carefully so as not to drop too many seeds in one place.After 20 days of sowing the seeds, they begin to sprout.Weeds start to appear along with the onion plants.Weeds need to be removed so that they do not take up all the water and fertilisers.If there are too many weeds, then the onion plants will not be healthy.The plants grow tall.The leaves start turning yellow and drying up.This means that the onions are ready to be taken out.The onions are now taken out.It is important that this should be done at the right time.If late, the onions will rot in the ground itself and all the hard work will be wasted.The dried leaves from the top of the onions are cut.The sacks are filled with onions and taken in a truck to sell in the big market.Thus, the correct way of doing it -D. Digging to loosen the soilA. Sowing the seedsB. WeedingE. Plucking the onion outC. Cutting the dried leaves from the top of onion.