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Answer:</h2><h2>THE ANSWER IS TROPICAL</h2>
Answer:
Green house effect and human activity.
Explanation:
-The green house effect: Some gases in the atmosphere trap the heat and doesn't allow it to scape making the Earth warmer.
-Human activity: The industrial activities have increased the carbon dioxic levels that have contributed to the higher temperatures. Also, deforestation, fluorinated gases and fertilisers containing nitrogen have contributed to climate change.
Mountain chains and river systems generally run North-South throughout the continent thus making for formidable barriers to East-West expansion.
