Answer:
Dead bodies of plants and animals that lived on earth millions of years ago.
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There were sea routes that covered the Mediterranean and Black Seas and numerous land routes using the roads built by the Romans. Trade and moving the Roman Army around were the two principle reasons for building roads.
<span>Climatic Variation of the Himalayas
</span> The Himalayan region mainly experiences two season winter and summer. The average summer temperature in the southern foothills is about 30 degree Celsius and the average winter temperature is around 18 degree Celsius. In the middle Himalayan valleys the average summer temperature is around 25 degree Celsius while the winters are really cold. And on the higher region of the middle Himalayas the summer temperature is recorded at around 15 to 18 degree Celsius while the winters are below freezing point. The climatic condition at region above 4880 m is below freezing point and it is permanently covered with snow. During the winter the snowfall is really heavy while the summers are much more mild and soothing. The Himalayan Alpine climate varies according to the altitude. The more the height the more cooler the temperature gets here. The climatic condition changes very quickly in the Himalayan region due to change in the altitude. The climate here is very unpredictable and dangerous too.
Short scale farming and large scale farming are the two types of Agriculture based on the availability of land.