From nomad to farmer

It's belived that people from Asia became to what is now North America by an ice bridge in wich the Earth was experiencing. They were the grand forefathers, we now call the Native Americans. This group of people were nomands, thet means they were walking and collecting food, but with the time they started to find sttlements. With the time they learned to raise plants and animals. The most important thing was the specific place were they settle, because they had to adapt to the climate if not they had to adapt to that place recourses. Their villages were closed to water sources wich was very important, for example to grow their plants they needed fertil land.

Key words:
Paragraph 1: earliest, North America, traveled, Asia, years ago
Paragraph 2: Earth, Ice Age, water, frozen, formed, ice bridge, walk, across
Paragraph 3: adventurous, grand, forefathers, Native Americans 
Paragraph 4: nomands, traveled, find, settlements
Paragraph 5: raising, plants, animals, agriculture, didn't, move, permanent homes, specific locations, live, near, water, recourses, strams, rivers, crops, humans
Paragraph 6: villages, moved, less, slowly, migrating, areas
Paragraph 7: tribe, adapt, climate, recourses, area, clothing, houses, built, food, region, live