Read the passage:

The graceful hawksbill sea turtle is found throughout the world's tropical oceans, especially in the diverse ecosystems of coral reefs. They are named after their narrow heads and pointed beaks. These reptiles are significant, as they have been swimming the Earth's seas for the last 100 million years. These turtles are essential to maintaining marine ecosystems, play an important role within the culture of people, and have great tourism value. The hawksbill sea turtle is known for its stunning, colorful, mosaic-like shell. These turtles are frequently hunted for their shells, which are sold in markets. They are used for home decoration, jewelry, and furniture. Due to the popularity of their shells, the hawksbill sea turtle population has declined by more than 80 percent. This rapid decrease because of human activities has put this species on the critically endangered list.

What evidence best supports the author's point that sea turtles are under threat due to human activity?

A )The graceful hawksbill sea turtle is found throughout the world's tropical oceans, especially in the diverse ecosystems of coral reefs.
b)The hawksbill sea turtle is known for its stunning, colorful, mosaic-like shell.
C) These reptiles are significant, as they have been swimming the Earth's seas for the D)last 100 million years.
These turtles are frequently hunted for their shells, which are sold in markets.