Nicotine is addictive because its chemical structure is so similar to the neurotransmitter acetylcholine that once inside the brain it unlocks several other chemicals. One of these chemicals is dopamine, which produces a highly pleasant sensation. Another is adrenaline, which increases alertness. Yet a third is serotonin, which improves one's mood. When people are deprived of these chemicals, they naturally want more, and this leads to addiction.
Nonargument

Nicotine acts like a key to open uncommon receptor particles outwardly of cells in the cerebrum, incorporating those in the prefrontal cortex. Nicotine makes these phones discharge flagging atoms, for example, dopamine (DOE-pah meen). These substance signals traverse a hole between nerve cells (called a neural connection). At the point when they arrive at the neighboring nerve cell, they discharge their "message." And it gives clients get a vibe decent high
Hence, the right answer is "Nonargument"