Why these pictures are refused ?

In addition to what @George_F said, the last two photos had shadows that were underexposed. The second photo has recognizable text on the jeep.

Greetings!

I found these photos pretty interesting, but when I viewed them at 100% I spotted some sharpness and noise issues.

The details were soft on this one and it had some noise that was caused in part by oversharpening I think.

The details were soft on this one too.  I saw it was shot at f5.6, 1/60thsec, iso2500.  A higher shutter speed and a smaller aperture probably would have helped, but I'm guessing with iso already at 2500 that a higher shutter speed and smaller aperture would have increased the iso so high that there would still be a lot of noise in this photo if taken hand held.

Soft details here as well.  This time it was shot a f/20 which I think caused some lens diffraction in combination with the focus being slightly off or there was camera shake with the shutter speed being at 1/60thsec.  The original of this one may be able to be sharpened, but it was hard to tell with the compressed file.  It also looks like the white balance is off or some sort of filter is applied to this one.

I hope this helps!

-George Folster