Answer: Emptying an aquarium containing non-native species into a local waterway.
Emptying an aquarium containing non-native species into a local waterway will most likely to cause the greatest disruption to an ecosystem. A non-native species can be invasive and may disturb the already living native species in the waterway. The non-native species will compete with the native species for food, mates and habitat and can cause decrease in abundance and death of native species. Hence, it will disturb the ecosystem of the local waterway.
This is totally wrong as most Arteries carry oxygenated blood away from.the heart to other organs and structures. Only the pulmonary artery carries deoxygenated blood to the lungs for oxygenation