Answer:
From what I am seeing, this SHOULD be, religions.
Explanation:
The reason i believe it is religions is because a religion is something you take part of because you believe in what they represent. I hope this helps and if it's wrong i'm so so so so sorry
The following sentence uses past participle of the verb <em>to choose - </em>the word <em>chosen </em>is past participle of the verb to choose, and along with the auxiliary verb <em>has </em>it makes the tense <em>present perfect.
</em>Present would be - choose/chooses.
<em />Past would be - chose.
Present participle would be - choosing. <em />