Xanthium and Parthenium are types of

The correct answer is Option (1) → Weeds

Weeds are unwanted plants that grow along with a crop and compete with it for water, nutrients, space and light, which lowers the yield. Xanthium and Parthenium (carrot grass, also called congress grass) are common weeds of Indian fields; Parthenium also causes skin allergies and breathing trouble in people.