翻译”这是房子，也是食物

用as well as 较好：
This is a house as well as food.

This isn't only a house, but also is food

This is a house , is also food

中文逻辑不通啊，除非，这里的“房子”是用巧克力等制作出的形状，可以译为：

This looks like a house, but is also edible.
这看上去像房子，但可以吃。

it's for living and eating as well