Question

The house was very old. It collapsed by .........​

Answer 1

Answer:

These can include ground movement and changing conditions in the environment, ageing of the building, poor structural design or substandard workmanship. Basically, when movement occurs, a rigid building is not flexible enough to bend without fracturing

Hope it's helped you ......

it is opinon only........

Answer 2

Your context isn't clear, I'm sorry.