What historical turning point is a significant event in history that has led to lasting change

which time period is this? or is this story fictional, i'm going to need more info to answer this question

what are you options

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.

true, they can both only can be studied with ancient text.