in the United Kingdom you can drink from the age of 4 if you have parental permission and are in your own home
In America it depends on the state when the laws are, but most you have to be 21 to buy it. Most kids that get alcohol underage have friends older relatives or even their own parents buy if for them. But you can get ticketed and fined for underage drinking as well as the adult can go to jail for supplying to a minor, so- better think it through.
you must be 21 to drink alcohol
yes
underage drinking
Is possession of alcohol considered a felony or misdemeanor?
No it is not legal.
No
In most states, a underage person cannot be at a party where alcohol is being served. This goes for anyone who is drinking or not.
Maybe you like the taste, but can't drink alcohol. (underage, pregnant)
No, you can be charged with underage use.
No.
No it is a misdemeanor in the state of Mississippi.
Alcohol is legal in the United States for purchase by persons over the age of 21, which is considered the "legal" drinking, possessing, and purchasing age. If you have a valid State Identification such as a Driver's License it is incredibly easy to get. For underage persons, it is still relatively easy to obtain, but it is illegal and the person who purchases it FOR the underage persons can go to jail for it, especially if the underage persons are drinking and, for instance, they get into a car accident that hurts others. In this case, the person who obtained the alcohol for the "minors" (the word for under the legal age defined in the law) could be held responsible for whatever happened, even if they were not present or participating in the situation. To answer your question directly, yes, alcohol is easy to get.