After reading all of the information given and looking at the diagram/map that you have posted, the answer is pretty easy to determine. The Marcellus shale that is generally found in New York State is found in the plateau landscape region. The correct answer is 2, plateau.
Mestizos mean "mixed" and the mixture is between the Spanish and the indigenous, Indian or Amerindian population (the population native to Americas).
Mulattos are half white and half black.
So the correct answer is C.
Limnology is the study of all inland waters, but limnos means lake in greek so im sure it should suffice