While a home was undergoing a renovation, workers discovered that there was asbestos in the walls. before any further work could be attempted, the family that owned the house had to evacuate, and specialists were brought in to remove the asbestos. why would the house contain a substance that forced the family to be evacuated?

asbestos is not harmful, and the family was evacuated due to routine construction protocol.
asbestos was once thought to be very useful, but now it is linked to lung cancer so the family was evacuated.
asbestos is not harmful, but the family was evacuated so that the asbestos could be recycled for another building.
asbestos was thought to be useful and is no longer used due to increasing costs to manufacture it.