Hi Amal
I'm not the one who can decide which thread should be closed. I can only see that you have already opened 32 threads and that most of them have at least one answer (most of them more than one). However, only two threads were closed.
I suggest you to review your old threads and check for which them the issue has been resolved. In this case, you should close the thread. Please follow the instructions from the blog How to close a discussion and why.
This thread is an example. If you found the solution with the distribution key, you can close the thread, so that another users (like me) stop answering.
BR
Caetano