They practice Islam religion.
They practice Roman Catholic religion
Buddhism is the religion. Buddhist practice Buddhism.
for unlock avatar you need the code ``airbender¨´,for king julien lemurking,for training,practice,for arcade ,freeplay,and for a training and arcade place,wasteplace
It is entirely up to you, how seriously you wish to practice your religion.
they practice the religion of pakarah, a ancient religion that revolves around the sun as the centerpiece of life.
I guess you ment " what religion do hindu's practice?" If so, it is Hinduism.
Europeans mostly study (practice) the catholic religion.
vedic religion
There is no named religion in the Avatar world. But if you were to label a real world religion to Aang, it would be Buddhism
Traditional tribal religion.
the religion of Aztec's is they practice sacrifice