An NGO is a non-governmental organization. They are voluntary groups, which are independent of governments. Some do get funding from government programs, but they are not under the direct control of a government office. NGOs typically also are not-for-profit; they are not businesses aimed at making money for themselves. Their aim is to help people in disadvantaged areas or circumstances. Some NGOs give out loans to help people improve their lives. Typically they will have more flexible or workable loan arrangements for a needy borrower than might be available from typical governmental sources of loans or traditional bank loans. For instance, there are NGOs that will grant small business loans without requiring collateral. Or there are NGOs that do microlending -- very small loans in developing countries to help someone get started with a very basic business. FINCA and Hope International are both examples of NGOs that do this sort of microlending.
It used an airlift to resupply West Berlin.
Answer:To Prevent Bias which may arise from a major difference from personal characteristics.
Explanation: Sampling is a part of a population that is to be used for a research or experiment.
Variables are factors or members of a sample or Population that are can be altered (Dependent variables) in order to create an effect on another variables.
Independent variables are variables that are consistent and are not affected by other variables.
To Prevent BIAS,proper Sampling or inducing independent variables it must include all the factors necessary in an experiment or research.
For enforcing laws, power vested in the president