I'm unable to listen to audio files or access external content directly. However, I can help you understand how to identify the main ideas based on the options given.

For question 1, you should listen for the main focus of the podcast. If the podcast emphasizes the importance of preserving crops globally and discusses the features or significance of the Global Seed Vault, then option B would be the correct answer.

For question 2, if the podcast mentions examples of how climate change has affected the Svalbard region or the Global Seed Vault, then option B would be the right choice. If it only refers to water entering the vault without a broader context, then option A may be seen as less significant.

After listening, consider what points were emphasized most by the speaker to choose the best answers. If you have specific content from the podcast or need further clarification, feel free to share!