a. Lantana

b. Cynodon

c. Parthenium

d. Eichhornia

Answer: b. Cynodon

Explanation: Non-native species are species that can enter the external ecosystem and compete with habitat, food and other species, often threatening the existence of biodiversity. Lantana originates in the tropical regions of the United States and Africa. Parthenium has been introduced in India as a wheat contaminant. Eichhornia is introduced with its beautiful leaves and flowers from South America, which have now become a weed that covers the entire body of water and inhibits the growth and development of the ecosystem.