What groups have similar roles: Coaches and officials Fans and parents Players and officials o Fans and coaches​

Fans and Parents

Explanation:

Fans and Parents have similar roles because they are both saddled with the responsibility of encouraging /cheering their team and wards respectively.

Both of them are also involved in the defense of their teams/ wards best interests, however, the methods involved in the processes are usually quite different.

These points makes it the best and most suitable answer in the list of options.

beta is electron from nucleus

something from nucleus has changed, but charge must be same for cons of charge