Which of these are reasons to evacuate a building during an earthquake? Mark all that apply. A. There is a water leak.
B. The building is on fire.
C. There is structural damage to the building like newly cracked walls.
D. There is a gas leak.

c, b

Explanation:

I am guessing those are correct I don't really know

only #2 represents an object at rest on a table.

in #1, there is no normal force due to the table; the object is accelerating downward.

in #3, the vertical forces are not balanced; the object is accelerating downward.

in #4, neither the vertical nor the horizontal forces are balanced. the object is accelerating upwards and to the right.