Can someone say why my image was not accepted and how I can make it better

Hi @Aswath26902915nqb0,

In addition to the link provided by @Jill_C you also need to look at these seven tips to get your photos accepted by Adobe and these additional tips that will help you improve your submissions.

Best wishes

Jacquelin

Whenever you're requesting advice here, you should always post the full size image, identical to what you posted to Adobe stock. Though the tiny thumbnail you posted doesn't allow close inspection, it is easy to see that it is very underexposed and blurry. 

Familiarize  yourself with the quality level and all other requirements for posting to Adobe Stock by reading all of the Help material here:

https://helpx.adobe.com/support/stock-contributor.html