Many scientists believe that the land bridge theory explains a) where the earliest americans found boat-building material. b) why the ice age delayed migration to south america. c) how people first migrated to north america. d) why north america experienced an ice age.

C) how people first migrated to North America.

you will need these

an outline of all three paragraphsan identification of the historical era that you are writing aboutan explanation of the term mass productiona description of two ways new technology affected industrya conclusion that shows how new technologies allowed industrialization to grow

2. a land bridge connected asia and north america thousands of years ago.

4. crossing the land bridge would have been simple for the first migrants.

5. people might have crossed a land bridge while hunting animals.