Use the paragraph to answer the question.
Penguins are some of the most enchanting creatures on the planet. With their black and white feathers and friendly demeanor, they are hard to resist. Penguins have been around since the early Eocene epoch, over 40 million years ago. They are native to the Antarctic regions but have been found as far north as the Galapagos Islands. Penguins have a variety of adaptations that help them survive in their cold environments. They have a thick layer of blubber to help keep them warm, and their waterproof feathers help to keep them dry when they are in the water. Penguins also have a streamlined body shape which helps to reduce drag while they are swimming. Penguins move by using their webbed feet to propel them through the water, and their wings are used to help guide them. Penguins also have an excellent sense of hearing, and they use their beaks to search for food on the ocean floor. Penguins have an incredibly social lifestyle, and they live in large colonies. They communicate with each other using a variety of vocalizations such as honks, barks, and brays.
What is the primary text structure being used in the passage above?
(1 point)
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descriptive
descriptive
sequence
sequence
compare/contrast
compare/contrast
cause/effect