How could shifts in the physical environment have caused major changes in early civilizations? Select all that apply. (1 point) Responses Buildup of silt could have made rivers less salty, increasing the supply of clean water. Buildup of silt could have made rivers less salty, increasing the supply of clean water. Too much or too little rain may have ruined crops, creating food shortages. Too much or too little rain may have ruined crops, creating food shortages. Long-term farming could have improved the quality of the soil, increasing crop yields. Long-term farming could have improved the quality of the soil, increasing crop yields. Earthquakes or erupting volcanoes may have destroyed communities. pick 2

1 answer

The two responses that best illustrate how shifts in the physical environment could have caused major changes in early civilizations are:

  1. Too much or too little rain may have ruined crops, creating food shortages.
  2. Earthquakes or erupting volcanoes may have destroyed communities.

These events would have had significant impacts on food production and the stability of communities, leading to major changes in early civilizations.