me pueden ayudar a porque rechazan estas fotos

What did you do to this poor cat?

A lot of artefacts:

You should not change the colours into something unnatural.

Blue: clipping the blacks,

Red: clipping the whites.

This image has basically clipped away all useful information. You need to modify your post-processing.

With the campfire, you will need to enhance the contrasts and sharpness. With careful editing, this one could pass.

The flower has to have some sharpening applied, and the background is quite dark. This leaf is disturbing:

oruga con espinas (1) is a bit soft. I have the impression that there was quite some noise reduction going on.

Your first one has, in addition to the leaning horizon, which is an easy fix, some bad artefacts in the sky. You have clipping in the blues (arrow) and I would edit out that undefined something (cloud).

all are too dark.

The flower image is not well-composed - you should have removed that extra lead.

The fire pit image is blurry.

Leaning horizon in the first image and chromatic aberration in the second image.