Conservation and recycling were

Explanation:

Conservation and recycling were ways of saving the environment. Conservation can be defined as the ways through which the species, habitats are protect and maintain in order to save the ecosystem and environment.

While recycling is another way of protecting the environment by converting waste material into new material and new things. Through this way, the resources and money can be saved.

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.