Which species of shigella has a type that produces shiga toxin?
s. boydii
s. flexneri
s. dysenteriae
s. sonnei

S. dysenteriae.

Explanation:

Shiga toxin is expressed by the genes that are the part of the lamboid prophage genome. The main symptoms of shiga toxin are water diarrhea and abdominal pain.

Shiga toxin is produced by the species S. dysenteriae. Shigella is a gram negative bacteria and has the ability to replicate at the epithelial cells of the host organism.

Thus, the correct answer is option (3).

answer; ///i believe the answer is (antioxidant);

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."