What prevents continental crust from diving toward the mantle?

Which ofbthe following is a characteristic shared by both brazil and mexico

If we represent the solar system on a scale that allows us to walk from the sun to pluto in a few minutes, then a) the planets are microscopic and the stars are millions of miles away. b) the planets are the size of basketballs and the nearest stars are a few miles away. c) the planets are marble size or smaller and the nearest stars are thousands of miles away.

Which was not a country that massively built up its navy in the early 1900s? germany china united statesbritain