Final answer:
The pangolin is hunted due to its unique appearance, leading to its critically endangered status.
Step-by-step explanation:
The detail from the passage that best supports the main idea is that the pangolin is hunted due to its unique appearance.
According to the passage, pangolins are the most trafficked mammal on the planet because of their unique appearance.
Due to their scales made of keratin, which are used to make apparel, and the belief that their scales and blood have medicinal properties, pangolins are hunted at a high rate. This hunting has led to the species being critically endangered and facing the threat of extinction.
The detail from the passage that best supports the main idea that pangolins are at risk of extinction due to human activities is "The pangolin is hunted due to its unique appearance."
This points directly to the human influence on the decline of pangolin populations, emphasizing the demand for their scales in making apparel and for their supposed medicinal properties.