What is an NGO & How has the role of NGOs been transformed in the last 20 years?

MAKE SURE TO USE HAVARD REFERENCING, AND HAVARD REFERENCING ONLY essay of two questions, split equally. first question is what is an NGO? a non profit organisation, explain what is and what they do, how they help countries and their role in development, give examples.

Second question is how has the role of NGOs transformed in the last 20 years, what criticism they face and how they have adapted.What is an NGO & How has the role of NGOs been transformed in the last 20 years?