As this is a question that calls for opinions and opinions differ, you may see conflicting viewpoints.
Atheist Viewpoint
In my opinion, religion is nonsense. I respect all religions and have nothing against them but religion to me is the cause of all wars. But how do we know who created the world? How do we know that someone or something wasn't teaching cavemen to advance, and who is to say that aliens don't exist? It doesn't make sense that some worship Allah and and some worship Jehovah and each group claims that theirs is the only deity, yet you have people worshipping more than one deity.
I don't follow a religion per se, I am considered mennonite(anabaptist), but I live in the inner city where I evangelize and go to church regulary. I choose the anabaptist belief system because it promotes modesty, humility, no pride, family, and an accurate basis of The Bible. I think most of the people are going to hell and a very few are going to the promised land. I believe it is my job to follow Christ and seek others with fiery passion to follow Christ and repent, all while remaining a completly sold out Christian, with no worldy perceptions or possesions.
They practice Islam religion.
They practice Roman Catholic religion
Buddhism is the religion. Buddhist practice Buddhism.
they practice the religion of pakarah, a ancient religion that revolves around the sun as the centerpiece of life.
vedic religion
It is entirely up to you, how seriously you wish to practice your religion.
Traditional tribal religion.
the religion of Aztec's is they practice sacrifice
What religion are the Kurds
what religion did the tongva practice
I guess you ment " what religion do hindu's practice?" If so, it is Hinduism.
Europeans mostly study (practice) the catholic religion.