Xi needs to stay awake another hour to study for his english final, so he drinks several cups of cola. when he's done studying, he finds that he can't sleep even though he wants to, he feels agitated, his muscles twitch, his heartbeat is irregular, and he feels nauseated. what is causing xi to feel this way? caffeine insomnia narcolepsy sugar

Caffeine

Explanation:

The most likely reason for Xi to feel this way is caffeine. Caffeine is a chemical that is found in many drinks, such as coffee, tea and cola. Caffeine causes mental alertness, which is most likely the reason why Xi was drinking cola in order to stay awake. This occurs because caffeine stimulates the central nervous system, heart and muscles. However, it can also cause excessive urination, insomnia and dehydration, among other effects.

is this supposed to be a question

it´s related to his charming character.

beauty is not everything, although we can joke that girls only care about the physical or material aspect, the truth is that a real woman looks at more important things, besides intelligence and personality, there are other attitudes that make irresistible to men who are 'unattractive'.

for example develop your sense of humor.