8.-10. soruları aşağıda verilen parçaya göre cevaplayınız.
The Florida manatee is a large marine mammal with a rounded, heavy grey body and a horizontally flattened tail. Native Americans hunted manatees for centuries, using their flesh for food, their bones for medicine, and their skin for leather. When Spanish explorers began colonising the Caribbean islands in the 16th century, manatee hunting increased. Biologists believe this hunting is responsible for the manatee’s initial decline. Natural events, such as sudden changes in water temperature, also can be deadly to manatees. In the 1980s, three abnormally cold winters in Florida lowered water temperatures throughout the state. In water below 15°C, manatees become lazy, stop eating, and eventually die. Many manatees perished during those cold Florida winters. The greatest continued threat to manatees, however, comes from humans. To fix this problem, in 1978, the Florida legislature passed the Florida Manatee Sanctuary Act, which designated the entire state a shelter and a protection area for the animal. In areas declared manatee shelters, no boats, swimmers, or divers are allowed.
8. Which could be understood from the passage?