Purple loosestrife is an invasive plant that was brought to the united states in the 1800s. which of the following describes the most likely long-term consequence of the introduction of purple loosestrife? a. herbivores will overpopulate due to an abundant food source. b. native plant populations will decrease as they are choked out by the purple loosestrife. c. purple loosestrife will begin to crossbreed with native plant species. d. air quality will improve as a result of the increased rate of photosynthesis.