Select all correct answers water hyacinth is an aquatic weed. it’s considered a troublesome weed when it grows outside its native region. water hyacinth can cover lakes and block sunlight from reaching underwater plants and animals. what are the likely effects of water hyacinth spreading outside its native environment? a. proliferation of a new, invasive plant or animal species b. displacement of native species c. die off of plants and animals that rely on photosynthetic plants for food d. increased oxygen levels in the water and growth of other plants and animals