Answer:
Acetylcholine.
Step-by-step explanation:
Botulism is a serious medical condition that causes paralysis in an infected individual. The botulinum toxin is released by the bacteria Clostridium botulinum.
The botulism prevent the release of the neurotransmitter acetylcholine at the neuromuscular junction. This causes the flaccid paralysis in the affected individual.
Thus, the correct answer is acetylcholine.