Answer:
A nerve agent can cause a variety of physiological reactions in the human body. Some common reactions include respiratory issues such as difficulty breathing, coughing, and chest tightness. Other reactions may include muscle twitching, seizures, and loss of consciousness. A nerve agent can also affect the digestive system, causing nausea, vomiting, and abdominal pain. Overall, nerve agents can be very dangerous and effective weapons that can cause serious harm to those who are exposed to them.