Hello friend greetings to you, hope you are doing well and good there.
You said that a blockchain consists of interconnected blocks, each containing a batch of transactions. Yes this is true. These blocks then linked together in chronological order, forming a continuous chain. Hence a Blockchain is made with us.
You have made a beautiful attempt to explain the Steem Blockchain sequencers. The process of sequencing transaction in a Blockchain involve various steps. All steps are easy to understand.
I wish you very best of luck in this contest.