Answer:
lack of industrialization
Explanation:
The developing nations are nations that are classified as nations with low development. This type of nations are usually poor, their economies are not in good condition, there is lot of corruption, and the people often don't have most of basic means for life at disposal.
Another major characteristic of these nations is the lack of industrialization. Very often, these nations have economies that are based on agriculture, but agriculture that is practiced in primitive manner and there is only one major or just few products that are being produced.
These nations tend to stride toward industrialization, and the developed nations are helping them with funding and investments. Unfortunately, the large scale corruption is hindering this process, and these nations tend to stagnate instead of move forward.
the answer is the one u put...
I think that they can either use fossils or age of rocks
