Choose the word that is a necessary part of the underlined word.
Answer: Option D
Solution(By Examveda Team)To harvest something, one must have a crop, which is the essential element for this item. Autumn (choice a) is not the only time crops are harvested. There may not be enough of a crop to stockpile (choice b), and you can harvest crops without a tractor (choice c).
Related Questions on Essential Part