You are given a question or fill-in-the-blank question, two answer options (Option1 and Option2) and an Explanation. Your task is to find the correct answer (return the string of the correct option, not option1/2) for the given question from the given options and using explanation.

Q: Question: The electrons with the _____ energy are nearest to the nucleus. 
 Option1: most 
 Option2: least 
 Explanation: Electrons at higher energy levels, which are farther from the nucleus, have more energy.

A: least
****
Q: Question: The convection of the Earth begins to slow down, so Daniel is worried that the plate tectonics will be 
 Option1: faster 
 Option2: slower 
 Explanation: Convection on early Earth was faster and so plate tectonics was faster.

A: slower
****
Q: Question: Suzie is studying different countries and the amount of energy sources they use. She finds that South Africa is poorer than the United States. Therefore, _____ uses less energy sources. 
 Option1: South Africa 
 Option2: the United States 
 Explanation: Richer nations use far more energy resources, especially fossil fuels, than poorer nations do.

A:
South Africa
****