Veganism is a lifestyle where people choose not to eat animal products and also not to use any other form of animal products.
That would be too extreme for me, but I do not eat meat.
There are many different types of veganism. 
Yeah I guess it just depends on a person's individual beliefs and perferences.
Some vegans are against ANY use of animals for anything, like clothing. They call this an 'ethical vegan'.
That would be very difficult and stressful to try and figure out what everything is made out of.
Vegan diets can reduce the chance of different diseases, like heart disease.
That would make sense.
, New Zealand Ministry of Health, Harvard Medical School, and the British Dietetic Association. The German Society for Nutrition does not recommend vegan diets for children or adolescents, or during pregnancy and breastfeeding. In preliminary clinical research, vegan diets lowered the risk of type 2 diabetes, high blood pressure, obesity, and ischemic heart disease. Vegan diets tend to be higher in dietary fiber, magnesium, folic acid, vitamin C, vitamin E, iron, and phytochemicals; and lower in dietary energy, saturated fat, cholesterol
it the largest animal rights group in the world. Its slogan is "animals are not ours to eat, wear, experiment on, use for entertainment, or abuse in any other way."
Alternatives and reactions Veganism and vegetarianism.
Veganism is the practice of abstaining from the use of all animal products, particularly in diet. Vegetarianism is the practice of abstaining from the consumption of meat (red meat, poultry, seafood, insects and the flesh of any other animal and may also include abstention from by-products