Giant pandas are native to China and are known for their distinctive black and white fur. They mainly eat bamboo, spending up to 12 hours a day feeding. Although they are carnivores by nature, their diet shifted to bamboo millions of years ago, possibly due to a lack of other food sources. Today, habitat loss is the main reason why they are an endangered species.
What is the primary reason giant pandas are an endangered species today?
A) They eat too much bamboo.
B) They are naturally carnivores.
C) They live in cold climates.
D) Habitat loss.