GIVING BRAINLIEST TO THE CORRECT ANSWER The Harappans depended on annual winds to bring rain from the Indian Ocean to Southeast Asia.

tornado

flood

hurricane

monsoon

The Harappans depended on annual monsoon winds to bring rain from the Indian Ocean to Southeast Asia.

Explanation:

All other factors, except monsoon, given in the options are hazardous as they cause destruction to wealth and life. So, for sure, Harappans won't depend on annual factors like these which would harm them instead of benefitting.

Furthermore, The cycle of monsoons can be observed following a pattern, and people can be somewhat sure about when to expect Rains. But tornadoes, floods, and hurricanes don't follow any such pattern and, thus, might not add in annual factors.

christopher columbus (1492–1504)

crop rotation kepy different plants in the soil instead of once constintly. when switching out plants you have different nutrients being absorbed at different speeds and different roots growing differently therfore the spoil and water flow have to adapt and carry fresh nutrients to carry the constant changes that were going on in the soil.