Hi, @yulicolmenares. There are a few issues with your article:

• All of the images you were using are non-reusable. Please refer here if you're not familiar with what I was talking about.
• You need to cite your images' sources appropriately. The link should send people to the information of the original author and license version.
• You need to cite your article's references.

If you have any problem regarding STEM-related articles, you can join steemSTEM Discord Channel and we will be glad to assist you.