Answer:
Desertification
Explanation:
Drought and leaching leave some parts of Africa without much water, which leads to some portions of the area to turn into a desert, which can prove disastrous for the plants and animals that now find themselves in a completely different habitat.
I think it's letter B. When an object freezes, such as ice, their molecules will be contracted due to the molecules that looses kinetic energy. When there is a lose of kinetic energy, then the temperature is cold. So the answer is contraction because it causes the molecules to freeze.<span />
1 and 3 are correct, this is due to the fact that modern technology is constantly growing and other developed nations are feeling threatened or inferior when another developed nation grows further ahead. National security has also grown global, just the threat of a foreign country developing nuclear capability is enough for another country to launch missle strikes or other acts in order to quell the threat of another nuclear capable country. 2 is not correct because industrial strategies are being shared throughout the world constantly and the safety of a country no longer stands by their standing army or navy, but by the threat of nuclear capability or a possibility of retaliation through explosive nature. Even today, most wars are done through the army holding down a line, and the navy/airforce launching long ranged missile attacks of various nature.
There needs to be more information to answer this question. is there a pic of the answer choices or can you copy and paste them?