Acommon trait shared by many developing nations is that they

have less developed infrastructure

are all located in latin america

have political stability

have ”western” economies

Not all developing countries are in Latin America; many are in Africa and Asia.

They are not called "Western" - as most western countries are developed, not developing. The correct answer is that they have less developed infrastructure, as their infrastructure is still developing. 

The common trait shared by many developing nations is that they : have less developed infrastructure

Compared to the developed nations, less-developed ones usually do not have the quality of the public service that the developed one have, such as bad roads, bad communication service, bad law enforcement system, etc

hope this helps