Question

Read the following statements about various species of plants and animals.
Based on these statements, which one would most likely be classitied as an invasive species, and not just a non-native species, in the United States?

Species A is a plant from Eurasia. It is often considered a weed by homeowners and killed by using an herbicide. This plant can be consumed in salads or as a tea and is the first food resource for bees in the spring. It does not grow uncontrollably.
Species D, native to Eurasia, has been released in various American states to combat the invasive plant, purple loosestrife. It does not affect other native plants.
Species B is from Europe and can sting people. This species is often farmed in America for its ability to pollinate and provide honey.
O
Species C, a plant from Japan, was introduced as a foliage crop and to reduce soil erosion. It grows up to a foot per day, smothering low-growing plants and killing trees. It has no natural predators.

Answer 1

Species C.

Reason: It was introduced for erosion control but grows extremely fast (up to ~1 ft/day), smothers native vegetation and trees, and lacks natural predators — all classic characteristics of an invasive species. The others are non‑native but do not show the uncontrolled, ecosystem‑damaging spread described for C.