Hello, @Rashia!! What a great evolution in your analysis of the Steem World!! Is not amazing how some practices let you describe how this tools work. The user experience is important on all the levels to develop the designs, codes and fix the bugs.

You are creating a very useful library. I'll try to answer some of your questions and some precisions:

• Replies are comments for your posts and comments by other users. In other words, the number of replies you have received.
• You can delegate, using your active key and setting an account to delegate. You can un-delegate, the process takes five days, you can see if some delegation it's on expiration time.
• CSI: It's a coefficient which somehow reveals how are you distributing your votes and self-voting. In some cases this represents concentration of the vote with a low or negative CSI. (As you and me are now in a project voting on a group of people this is represented with the negative CSI, but it's an open way for the mutual growth). Some have a positive CSI, this is achieved with a larger dispersion of the votes through accounts and less self-voting. For now, you must not be worried about that number. It says more for much larger accounts.
• Block Explorer: Every transaction made on the blockchain, from a post, to a vote or a transfer of funds, is validated by a Witness node and archived on a block with all other validations occurred in three seconds. In the block explorer you can see which transactions are registered on that block, being irremovable from the blockchain as all the nodes register the block.

Definitely SteemWorld is the most complete application to perform any wallet transaction and for retrieve any possible information on the blockchain. These months SteemChiller has been working really hard in the development.

Thank you very much for participate in this week's Open Source challenge by the Knitrias Project.

Best wishes for life and projects!!