how to be involved in developing country

Today I discussed developing country with my English teacher through Angelina Joli.
She is a famous actress and marital relationship with Brad Pitt.
They have a daughter and three orphans. Three orphans came from developing coutry where she went to. But I wonder what is measure for her to choose children. There are many children and eveyone wants to be well-off. She just select one child there probably. Every children have right to be choosen.
Also, my English teacher said to me, "They have their daughter and their love might lean her."
I totally agree!! Equality is very difficult and orphans feels difference.
So If she wants to support developing coutry, it's better to donate money.
Money would use for everyone in developing coutry.
I hope so.
But She is a one of great person and continue her great work.