Judaism, Christianity, and Islam were all founded in southwest Asia, more specifically the Middle East.
Christianity and Judaism
Nothing. If by "the religions of Southwest Asia" you are referring exclusively to the three monotheisms (Judaism, Christianity, and Islam), then the unifying trait is monotheism. However, there are numerous religions from Southwest Asia such as Zoroastrianism and Mandaeism whose adherents are henotheists or polytheists.
judaism
Christianity was developed through numerous councils that took place in both Europe and Southwest Asia after Jesus' crucifixion in Jerusalem (Southwest Asia).
Hinduism, Buddhism, and Islam
Spearmint is made from the species of mint Mentha spicatawhich can be found in southwest Asia and Europe.
No. Saudi Arabia is in southwest Asia.
RUSSIA
Judaism, Christianity, and Islam were all founded in southwest Asia, more specifically the Middle East.
The Atlantic Ocean is a formal factor that connects Egypt to Africa to Europe and to the southwest Asia.
Europe, Asia, and Africa.