Lock #5 Question:

What could the main idea be if the supporting details were:

1. One of the weirdest foods in the world is Tuna
    eyeballs, which are sold in Japan.

2. Another one of the weirdest foods is a "century
    egg", which is 100-year-old egg, which is a food
    eaten in China. 

3. In Cambodia, people eat fried spiders - large 
    fried spiders, which are as big as tarantulas.