Answer:
Early residents of the Indus Valley created streets and buildings using a grid pattern.
I only photographed my textbook but this page gives a lot of information about your question
The country that is an isthmus and links central and Souh America is Panama
Based on the information given, it can be deduced that the reliable paleoclimate record was about 800,000 years ago.
Paleoclimatology simply means the study of the climate of the Earth. It's the study of climates where direct measurements were not taken.
It should be noted that the reliable paleoclimate record from the Antarctic and Greenland ice cores provides information back to approximately 800,000 years ago.
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