I took care about images since I was shooting, but it has been rejected

I suggest you color calibrate your computer display.  Poorly calibrated equipment can lead to unwanted results.

Apart from lack of sufficient light, you have over-saturated the colors.  Unfortunately, these are not suitable for commercial use.

Enroll in some photography courses to learn proper use and care of your equipment.  It's too much to cover in a user-to-user forum. 

Without technical issues, you would need a model release for this lady:

Hello,

The images are underexposed! Why, you might ask as I used the camera's exposure meter. This is because there is a lot of reflection. The light is harsh, which creates strong shadows. The camera's light meter decided there is a lot of light and set the exposure accordingly. In this situation, you have to use the camera's exposure compensation to compensate for the light.

You used a telephoto lens as well, so you also need to make exposure adjustments. This can be done in post-processing.

Hi @AdrianEC ,

The first photo has damaged pixels, underexposed, out of focus, saturated, noisy and has a white balance issue.

The second photo is as the first except it has color fringing on the edge of the palm.

The third photo is sharper then the previous two but is over saturated and grainy.

The fourth is as the first 2 files

The fifth is also grainy, over saturated, a little underexposed and has motion blur.

Best wishes

Jacquelin

AdrianEC_Miam23-0088.jpg - shadowy areas are all underexposed. White Balance appears to be too blue, and they're a bit oversaturated. Did you do any editing on this image? It can probably be improved with minimal editing. You would need a model release for the man on the left.

2nd image - same comments as above.

AdrianEC_Miam23-0019.jpg - same as above, plus several sensor / lens spots are visible in the sky

4th image - same as no. 1 above.

5th image - babe is blurry, so this one can't be improved by editing. Of course, you'd need a model release for her as well.

Viewing the Histogram alone would warrant a rejection with these photos.  Almost every photo is missing whites completely.  The information in a digital photo should span the entire length of the histogram.

-the toddlers hands are blurry.  I think the bright sand pulls the eyes away from the main subject here.  I liked this one the best.

-The others had dark foregrounds in my opinion.  This probably had to do with the harsh light conditions when the photographs were taken.  There were other smaller things like some light chromatic aberrations in the trees, and a few dust spots here and there.

I hope you have better luck with future submissions!

Your exposures are off in all of these images.  They are very dark with no middle range that would allow the view to see faces.  and midrange features in the images.