“THEIR DEPENDENCE ON BAMBOO IS THE MAIN THREAT TO THEIR SURVIVAL”...

22. “Their dependence on bamboo is the main threat to their survival” means a) They often fall from bamboo plants and injure themselvesb) The unreliability of the bamboo plant is the greatest danger to pandas, because it is the only food they eat.c) Pandas use bamboo sticks to defend themselves against other pandas.d) They live on a diet of rock-hand bamboo stems.