$\backslash$table$[[$Victorian house,$\backslash$table$[[$Bricks $($similar to$],[$ceramic$)$ and$],[$stone$]]],[$Mongolian ger,$\backslash$table$[[$Animal skin and$],[$wood $($fibres$)]]],[\backslash$table$[[$Corrugated$],[$metal slum$]],$Metal sheets$]]$

$($b$)$ What are the dangers of the materials used in the Japanese house?

$($c$)$ What are the disadvantages of using metal sheets for the houses?