The water hyacinth is a floating plant that is believed to have entered New Orleans in
1884. It reproduces quickly, forming a dense mat and often jamming rivers and lakes. It
is on Florida's Exotic Pest Plant list. What conclusion can you draw about the water
hyacinth's effect on native water plants?
a) Native species use the water hyacinth for support as they grow
b) It blocks light and air from native species and impedes their growth.
c) It is a good companion plant for native species and helps them grow
d) Native species rely on the water hyacinth for protection from direct sunlight.