The evolution of sea slugs

The essay is a review of the three papers | provided. My topic is how sea slugs retain the chloroplasts from food. “Crawling through time” one is more general about the evolution of sea slugs. The other two are more specific. Please make sure to answer questions like which species of the sea slugs are able to retain the chloroplasts and are there divergence showing in the tree. Please also review and explain the related hypothesis, data, experience, etc. in these articles. Using trees, chart, or other visuals are also important.