Which organization functions to provide clinics and surgeries in developing nations?

UNICEF
Doctors Without Borders
International Red Cross
World Health Organization Explain the importance of an environmental contingency plan.

Ascientist performs an experiment where she measures the mass of a piece of metal, pours acid onto the metal, washes the metal, and then re-measures the mass of the metal. the scientist repeats the experiment several times, each time increasing the amount of acid used. the dependent variable in the experiment is the: initial mass of the metal final mass of the metal amount of acid used washing the metal