Answer: Pre-Revolutionary War treaties
2 U.S. international treaties
2.1 1776–1799
2.2 1800–1849
2.3 1850–1899
2.4 1900–1949
2.5 1950–1999
2.6 2000–current
3 U.S.–Native American treaties
3.1 1778–1799
3.2 1800–1809
3.3 1810–1819
3.4 1820–1829
3.5 1830–1839
3.6 1840–1849
3.7 1850–1859
3.8 1860–1869
3.9 1870–1879
3.10 1880–present
Explanation:
A. lines of latitude because latitude is horizontal
Answer:
I think 4) the focus is the answer
