Its true but it also refers to the nervous system that can be activates by many other thing like sex if the correct place and time is advised.
They use needles, nose spray (or something like that) The vaccine is just weakened virus, so the immune system can battle the weaken (or dead) virus without the virus harming your body.
Answer:
1. Physical: Gaming for hours upon hours can damage your eyes.
2. Mental/Physical: It can deprive you of sleep, for exmple , If you are playing a horror game, then it can make you scared. Some games can even trick you into doing stuff like giving away personal information.
3. social: In some games, it requires you to be social, most games are not going to make you weird or anti social as most parents might say...
Explanation: This is from my experence.
In a popular use of the term calorie, dietitians loosely use it to mean the kilocalorie, sometimes called the kilogram calorie, or large Calorie (equal to 1,000 calories), inmeasuring the calorific, heating, or metabolizing value of foods.
calorie is the answer
