Please choose two of the following four photos, briefly introduce the architectural features and distribution areas of the house, and talk about such buildings and the local geographical environment.

From the four photos, it can be seen that B is an igloo in the Arctic. The climate in the Arctic is cold, and the local Inuit people use local materials to build an igloo to live in, which has a good thermal insulation function; D is a high-rise house, which belongs to a kind of dry-rail building in the south. Its roof is shaped like a "human", which is easy to drain and will not cause water accumulation. The ground floor is generally uninhabited, where poultry are raised and firewood is piled up, and the upper floor is where people live. This kind of house has excellent ventilation conditions and is very suitable for hot and humid climate conditions.

Therefore, the answer is: B is an igloo in the Arctic region, and the climate in the Arctic region. D is a high-rise house, which belongs to a kind of dry-fence building in the south. Its roof is herringbone, which is easy to drain and will not cause water accumulation. The ground floor is generally uninhabited, where poultry are raised and firewood is piled up, and the upper floor is where people live. This kind of house has excellent ventilation conditions and is very suitable for hot and humid climate conditions.