Explanation:

Let’s break it down:

- Option 1: Marriage engagement

This means the formal agreement before marriage, kind of like saying “yes, we’re getting married.”

- Option 2: Exchange of rings before marriage between bride and bridegroom

More specific than option 1—about the ring ceremony, which is part of engagement practices in lots of groups.

- Option 3: Widow-remarriage

This is when a widow marries again.

- Option 4: Widow-marriage

Almost the same as 3, but technically “widow-marriage” is just the act itself.

Now, here’s the thing: In the Kharia tribe, “Sagai” actually means marriage engagement—the formal agreement or promise between families about the upcoming marriage.

The correct answer is Option 1: Marriage engagement.

So if you want to pin down what “Sagai” is for the Kharia tribe, go with engagement, not widow-marriage. Hope that clears it up!