The mesopotamian religion, which featured nearly 3,000 gods and goddesses, can be described as

If a religion believes in more than one god or goddess it can only be polytheistic.

the lachish letters were written by hoshaiah, a military officer stationed possibly in mareshah,   and sent to yaush, possibly the commanding officer at lachish.

the series of letters were written in carbon ink in ancient hebrew on clay ostraca, shortly before lachish fell to the babylonian army of king nebuchadnezzar in 588/6 bc during the reign of zedekiah, king of judah.

i think that the right answer is the aztecs