please help me
fill in the blank
Present-day Arizona was home to the (1)___ people. Their

way of life depended on the (2)___ they dug to carry water

to their fields. The (3)___ lived in the area known as the Four

Corners in great stone dwellings called (4)___, or villages, as

well as in cliff dwellings in the walls of steep cliffs.

Several different groups of people, known as (5)___ built

thousands of mounds of earth in central North America.

One of these groups, the (6)___, built the Great Serpent

Mound. The largest settlement was (7)___.

The last group of people to cross the Beringia land bridge

into North America was called the (8)___. Their main occupations were (9)___. The mild climate and dependable

food sources of the (10)___ created a favorable environment

for many different North American groups including the

Tlingit, Haida, and Chinook, who adapted their way of life

to the (11)___; the people of the (12)___, an area between

the Cascade Mountains and the Rocky Mountains; and those

who settled in the (13)___ between the Sierra Nevada and

the Rocky Mountains. The peoples of the Great Plains were

(14)___, traveling from place to place in search of food.

Native Americans who lived in eastern North America

formed complex political systems to govern their nations.

After years of warring, the five Iroquois groups joined an

organization called the (15)___. Among those who settled in

the Southeast were the Creek, Chickasaw, and (16)___, who

farmed the mountains of Georgia and Alabama.