It is entirely up to you, how seriously you wish to practice your religion.
They practice Islam religion.
They practice Roman Catholic religion
Buddhism is the religion. Buddhist practice Buddhism.
No.
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.
Seriously?
vedic religion
They built temples to practice in them
Traditional tribal religion.
the religion of Aztec's is they practice sacrifice