Cholera is a disease that is spread in water. which treatment would most likely benefit society to prevent the spread of cholera?
a. adding antibiotics to the water
b. irradiating the water
c. improving sanitation
d. restricting use of natural water sources

Hydrilla (hydrilla verticillata) is an invasive aquatic plant and one of the most serious aquatic pests in florida. hydrilla has already been introduced to hundreds of bodies of water throughout florida, hydrilla is difficult to control because it grows rapidly and survives in many different water depths and conditions. hydrilla • describe how hydrilla affects native plant and animal species. include both a biotic and an abiotic limiting factor. • suggest one biotic and one abiotic recommendation that could slow the spread of hydrilla