Who created the periodic table and in what year?

In 1869, the Russian chemist Dmitri Mendeleev published his first periodic table of the elements arranged in order of increasing atomic mass.

Mendeleev organized his table in horizontal rows, leaving empty spaces where they had to incorporate some elements that had not yet been discovered.

the answer is b: the religion they practice.

here's why:

there were many different native american tribes and those with similar characteristics formed a main tribe or nation. each had its own language, religion and customs.