Why are the elements related to trade found in the grave as important as those related to war?

Because trade was also an important element for ancient civilizations. Having a shaping character of societies, equal to the incidence of wars.

Explanation:

Trade was an extremely important element in ancient civilizations. The forms of commerce and objects used by traders said a lot about the culture and customs of a people, in addition to showing how societies were shaped through the years in which they existed. In addition, commerce was a constant element in the life of civilizations, since its occurrence took place every day. These features show how trade-related artifacts are as important as war artifacts.

the answer is use of support  

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.