Which of the following is not a factor that is preventing agricultural success in less-developed countries? a. geography and climate b. lack of access to fertilizers and machinery c. less access to education and training d. investment in high-value crops

The appropriate answer is A. geography and climate. The geography and the climate is not the limiting factor to agricultural success in less-developed countries. In fact, some least developed countries have the ideal climate and geography for agricultural success. 
Agricultural success is limited by a lack of access to fertilizers and machinery, less access to education and training and the no investments in high value crops. 

Earths place in space 

The answer is the magnetosphere.