Volunteers.
Such a person is known as a volunteer.
It helps people block out other noises and focus more on what their doing therefore music helps people concentrate then without music.
leader
A Medium
people can talk to each other without meeting in person
No
The other person has to have the game, and you can ds download.
No, So long as the person with the "free long distance" plan calls the person without the free plan. Most phone companies do not charge fees to receive incoming calls, reguardless of what plan the other person has. Hope this helps.
a device on a motorbike that helps you pull away quicker than other bike without it and the first person to the first corner is the holeshot
Such a person is called a narcissist.
people effect each other in sevral ways. like if one person gives a charity a bunch of money. that charity helps people the person they help does something else to help someone else an so on and so on.
You can do some jobs at a distance, without much interaction with other people. For instance, Upwork is a company that connects people who need work done, with people who want to do the work.