To tame animals for human use 1 paleolithic age
2 technology
3 domestication
4 neolithic age
5 specialization

Domestication

Explanation:

Domestication has always been very useful to people. It is a way to tame animals so then after you could use it to benefit you. Either for farm work or even food. This is very common now a days.

For example. Cows are domestic animals. They live on farms, work in the fields, give us milk, cheese, butter and eventually meat for us to eat.

I don't know if I understood the question good, because its not clear, but I Hope this Helps!

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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.