You are presented with the quiz "How do leaves keep animals from getting cold? "   But you don't know the answer, so you turn to your teacher to ask for hints. He says that "preventing the transfer of heat from an organims 's body causes that organism to keep warm" and "leaves can keep animals warm".   So, what's the best answer to the question?

Answer: preventing heat transfer


You are presented with the quiz "what is used to determine the age of fossils?"   But you don't know the answer, so you turn to your teacher to ask for hints. He says that "radioactive dating is used to determine the age of fossils" and "radioactive isotopes are commonly used for dating ".   So, what's the best answer to the question?

Answer: isotopes


You are presented with the quiz "What causes erosion?"   But you don't know the answer, so you turn to your teacher to ask for hints. He says that "wind causes erosion" and "hurricanes are made of wind".   So, what's the best answer to the question?

Answer: