Hello @preshdan, I’m glad you participated in the 4th Task of the Beginner’s class at the Steemit Crypto Academy. Your grades in this task are as follows:

Observations:

In the process of validation for PoW, high level of energy is essential which makes the sustainanse of Pow operation very expensive

That's true. PoW consumes high amount of energy and this makes the operation cost very expensive.

Recommendation / Feedback:

• I'm impressed by your effort to answer every question in details. This shows you clearly understand the topic.
• I notice some grammatical errors that can be avoided using Grammarly. So I suggest you use it in your preceding tasks.
• Your presentation is awesome. I commend you in that. Please keep this energy in Crypto Academy.

Thank you for submitting your homework task 4. We hope to see the rest of your submissions.