Hello, @kamrulkhan. On Steemit, we value users' identity as such you are expected to have fulfilled a few requirements before you can be eligible to participate in our contests.
One of those things is getting verified in the Newcomers' Community and performing other achievement tasks over there. You can learn more about what is required of you in the newcomers' community through your mentor. Going through your profile, you have not written any achievement tasks before not even the first one that deals with introduction of yourself to the platform, I urge you to work on that.

In addition, subscribe to other communities and publish your content, we would measure the legitimacy of your activities over time and you'd be qualified to participate here. At the moment, you are not eligible.

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