One effect of acid rain on an ecosystem is ?

Match the type of adaptation to the correct example, structural adaptation functional adaptation behavioral adaptation example type of adaptation elephants live in herds to protect their young leaves of a rain forest plant species have a pointed tip that enables rainwater to drain off easily. camels have nostrils that they can close snakes produce venom to kill prey and defend themselves. earthworms coil when touched, as part of a defense mechanism. human skin darkens with increased exposure to sunlight.

Why are human population trends difficult to predict?

Explain what role the narrator believes he is playing in telling the story. describe how this belief will affect the story. your answer should be at least 250 words.