First time contributor looking for critiques on two photos that were rejected on Technical Issues

2. is quite obvious, when looked at 100%:

You see artefacts typical for phone images and they are difficult to correct. In this case, take the image for what it is: a nice view out of the plane window.

1. The bench is more difficult for the defects to be seen.

Besides a slight white balance correction you could try to correct the chromatic aberration on the handles.

I even would guess that the white balance may do the affair.

However, you also need to photoshop out the manufactorers reference, that's IP violation:

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Hi @Dipak Sundaram 

Zoom your photo to between 100 and 200%. For the first one, look on the edge of the airplane wing, your will notice that there is blue color fringing there. The sky display some amount of grains also.

The chair handles of the second image display blue and green color fringing. That photo is a bit too cool. You need to bring out a little more of the sun by adding some more warmth.

If you have not done so as yet you may read the articles of the following link.

Stock Contributor Learn & Support (adobe.com)

There are some kindle suggestions on my signature link if you care to invests in some literature for ideas from experienced photographer. 

Best wishes

JG