CLEAN : People line up for Covid-19 tests in Paris

The video covers various topics, starting with initial confusion about a subject. It then explores limitations and transparency in education, followed by a discussion on measurement and tips collection. Finally, it touches on silica functions and shipwreck-related topics.

What does the speaker imply about the function of silica during Christmas?

What metaphor does the speaker use to describe the situation involving shipwrecks?