The following passage appears on a website:

While born a drab shade of gray, flamingos eventually blossom into the pink-feathered creatures thanks to a diet solely based on carotenoids, or algae, larvae, and shrimp. The high consumption of carotenoids is broken down and absorbed by the digestive system, coloring the birds from the inside out.

Which choice best paraphrases the information?

Carotenoids are broken down and absorbed by a flamingo's digestive system, making them go from a drab shade of gray to pink.
Flamingos are born a drab shade of gray but eventually blossom into a pink color thanks to a diet of algae, larvae, and shrimp.
The flamingo's high consumption of carotenoids is broken down and absorbed into the digestive system, turning them from a drab shade of gray into pink-feathered creatures.
The pink hue of the flamingo's feathers is a result of the way their body digests a certain chemical they eat in large quantities.